PHYS2001 Physics Final

An Australian emu is running due north in a straight line at a speed of 13.0 m/s and slows down to a speed of 9.30 m/s in 4.10 s. (a) What is the magnitude and direction of the bird's acceleration? (b) Assuming that the acceleration remains the same, what is the bird's velocity after an addition 1.30 s has elapsed?

(a) -0.902 m/s^2 (b) 8.13 m/s

A fire hose ejects a stream of water at an angle of 31.6 degrees above the horizontal. The water leaves the nozzle with a speed of 22.2 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?

22.4 m

Communication satellites are placed in a circular orbit that is 3.72 x 10^6 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?

3.91 m/s^2

A pellet gun is fired straight downward from the edge of a cliff that is 26.6 m above the ground. The pellet strikes the ground with a speed of 36.2 m/s. How far above the cliff edge would the pellet have gone had the gun been fired straight upward?

40.6 m

A car is traveling to the left, which is negative direction. The direction of travel remains the same throughout this problem. The car's initial speed is 22.3 m/s, and during a 5.42-second interval, it changes to a final speed of (a) 27.9 m/s and (b) 15.1 m/s. In each case, find the acceleration (magnitude and algebraic sign)

(a) -1.03 m/s^2 (b) 1.33 m/s^2

A partly-full paint can has 0.615 U.S. gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 10.8 m^2), how thick is the layer of wet paint? Give your answer in meters

(a) 0.00233 m^3 (b) 0.000216 m

Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 80 kg, and the mass of the woman is 60 kg. The woman pushes on the man with a force of 65 N due east. Determine the acceleration (magnitude and direction) of (a) the man and (b) the woman

(a) 0.81 m.s^2 due east (b) 1.1 m/s^2 due west

A jogger accelerates from rest to 2.81 m/s in 2.99 s. A car accelerates from 24.6 to 42.0 m/s also in 2.99 s. (a) Find the magnitude of the acceleration of the jogger. (b) Determine the magnitude of the acceleration of the car. (c) How much further does the car travel than the jogger during the 2.99 s?

(a) 0.940 m/s^2 (b) 5.82 m/s^2 (c) 95.4 m

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 4.74 m/s when going down a slope for 3.09 s? (b) How far does the skier travel in this time?

(a) 1.53 m/s^2 (b) 7.30 m

An eagle is flying horizontally at 8.9 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?

(a) 1.6 s (b) 1.9 s

Three forces act on a moving object. One force has a magnitude of 85.7 N and is directed due north. Another has a magnitude of 60.8 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with a constant velocity? Express your answer as a positive angle south of east

(a) 105 N (b) 54.6 degrees

A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v(0x) = +7.4 m/s and a(x) = +8.0 m/s^2. The y components of the puck's initial velocity and acceleration are v(0y) = +6.9 m/s and a(y) = -3.5 m/s^2. Find (a) the magnitude v and (b) the direction theta of the puck's velocity at a time of t = 0.50 s. Specify the direction relative to the +x axis

(a) 13 m/s (b) 24 degrees above the +x axis

An airplane with a speed of 89.0 m/s is climbing upward at an angle of 45.7 degrees with respect to the horizontal. When the plane's altitude is 870 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point of release, to where the package hits the earth. (b) Relative to the ground, determine the angle of the velocity vector of the package just before impact. Use negative sign if the angle is below the horizontal

(a) 1326 m (b) -66.8 degrees

A skateboarder, starting from rest, rolls down a 13.7-m ramp. When she arrives at the bottom of the ramp her speed is 8.04 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 27.9 degrees with respect to the ground, what is the component of her acceleration that is parallel to the ground?

(a) 2.36 m/s^2 (b) 2.08 m/s^2

A space vehicle is coasting at a constant velocity of 18.4 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.206 m/s^2 in the +x direction. After 43.8 s, the pilot shuts off the RCS thruster. After the RCS thruster is turned off, find (a) the magnitude and (b) the direction of the vehicle's velocity relative to the space station. Express the direction as an angle (in degrees) measured from the +y direction

(a) 20.5 m/s (b) 26.1 degrees

The magnitude of a force vector F is 85.9 newtons (N). The x component of this vector is directed along the +x axis and has a magnitude of 78.4 N. The y component points along the +y axis. (a) Find the angle between F and the +x axis. (b) Find the component of F along the +y axis

(a) 24.1 degrees (b) 35.1 N

A jogger travels a route that has two parts. The first is a displacement A of 3.00 km due south, and the second involves a displacement B that points due east. The resultant displacement A + B has a magnitude of 4.60 km. (a) What is the magnitude of B, and (b) what is the direction a A + B as a positive angle relative to due south? Suppose that A - B had a magnitude of 4.60 km. (c) What then would be the magnitude of B, and (d) what is the direction a A - B relative to due south?

(a) 3.49 km (b) 49.3 degrees (c) 3.49 km (d) 49.3 degrees

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 27.5 minutes at an average speed of 9.11 m/s. During the second part, she rides for 32.8 minutes at an average speed of 5.00 m/s. Finally, during the third part, she rides for 9.21 minutes at an average speed of 19.5 m/s. (a) How far has the bicyclist traveled during the entire trip? (b) What is the average speed of the bicyclist for the trip?

(a) 35600 m (b) 8.55 m/s

A dynamite blast at a quarry launches a rock straight upward, and 1.8 s later it is rising at a rate of 18 m/s. Assuming air resistance has no effect on the rock, calculate its speed (a) at launch and (b) 4.9 s after launch

(a) 36 m/s (b) 12 m/s

A planet has a mass of 6.24 x 10^23 kg and a radius of 2.62 x 10^6 m. (a) What is the acceleration due to gravity on this planet? (b) How much would a 76.9-kg person weigh on this planet?

(a) 6.08 m/s^2 (b) 468 N

In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0510 s, during which time it experiences an acceleration of 262 m/s^2. The ball is launched at an angle of 54.6 degrees above the ground. Determine the (a) horizontal and (b) vertical components of the launch velocity

(a) 7.74 m/s (b) 10.9 m/s

One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 1.86 km. They start at the west side of the lake and head due south to begin with. (a) What is the distance they travel? (b) What is the magnitude of the couple's displacement? (c) What is the direction (relative to due east) of the couple's displacement?

(a) 8.77 km (b) 2.63 km (c) 45.0 degrees

Two soccer players start from rest, 36 m apart. They run directly toward each other, both players accelerating. The first player's acceleration has a magnitude of 0.45 m/s^2. The second player's acceleration has a magnitude of 0.45 m/s^2. (a) How much time passes before the players collide? (b) At the instant they collide, how far has the first player run?

(a) 8.94 s (b) 18.0 m

A rocket of mass 4.90 x 10^5 kg is in flight near earth's surface. Its thrust is directed at an angle of 57.0 degrees above the horizontal and has a magnitude of 7.75 x 10^6 N. Find the (a) magnitude and (b) direction of the rocket's acceleration. Give the direction as an angle above the horizontal

(a) 9.29 m/s^2 (b) 21.9 degrees

A stone is thrown horizontally from the top of a cliff and eventually hits the ground below. A second stone is dropped from rest from the same cliff, falls through the same height, and also hits the ground below. Consider the three quantities below. Are they the same for the two stones, or different? (a) Displacement: different or same? (b) Speed just before impact with the ground: different or same? (c) Time of flight: different or same?

(a) Different (b) Different (c) Same

An astronaut on a distant planet wants to determine its acceleration due to gravity. The astronaut throws a rock straight up with a velocity of +17.7 m/s and measures a time of 26.7 s before the rock returns to his hand. What is the acceleration (magnitude and direction) due to gravity on this planet? (positive = up, negative = down)

-1.33 m/s^2

Given the quantities a = 5.7 m, b = 6.2 s, c = 37 m/s, what is the value of the quantity d = a^3 / cb^2

0.13 m^2/s

A cement block accidentally falls from rest from the ledge of a 55.2-m-high building. When the block is 14.6 m above the ground, a man, 1.80 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have to get out of the way?

0.423 s

A woman on a bridge 91.7 m high sees a raft floating at a constant speed on the river below. She drops a stone from rest in an attempt to hit the raft. The stone is released when the raft has 5.66 m more to travel before passing under the bridge. The stone hits the water 2.36 m in front of the raft. Find the speed of the raft

0.763 m/s

Two forces act on a moving object that has a mass of 27 kg. One force has a magnitude of 12 N and points due south, while the other force has a magnitude of 17 N and points due west. What is the acceleration of the object? - 0.77 m/s^2 directed 55 degrees south of west - 0.63 m/s^2 directed 55 degrees south of west - 0.77 m/s^2 directed 35 degrees south of west - 1.1 m/s^2 directed 35 degrees south of west - 0.44 m/s^2 directed 24 degrees south of west

0.77 m/s^2 directed 35 degrees south of west

A major-league pitcher can throw a ball in excess of 39.0 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release?

0.931 m

A hot-air balloon is rising upward with a constant speed of 2.90 m/s. When the balloon is 5.16 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

1.36 s

When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 954 N and the drag force has a magnitude of 1091 N. The mass of the sky diver is 97.3 kg. Take upward to be the positive direction. What is his acceleration, including sign?

1.41 m/s^2

The velocity of a train is 80.0 km/h, due west. One and a half hours later its velocity is 65.0 km/h, due west. What is the train's average acceleration? - 43.3 km/h^2, due west - 10.0 km/h^2, due west - 53.3 km/h^2, due east - 10.0 km/h^2, due east - 43.3 km/h^2, due east

10.0 km/h^2, due east

A worker stands still on a roof sloped at an angle of 27 degrees above the horizontal. He is prevented from slipping by a static frictional force of 450 N. Find the mass of the worker

101 kg

A rocket is fired at a speed of 55.0 m/s from the ground level, at an angle of 63.0 degrees above the horizontal. The rocket is fired toward a 44.8-m high wall, which is located 40.0 m away. The rocket attains its launch speed in a negligibly short period of time, after which its engines shut down and the rocket coasts. By how much does the rocket clear the top of the wall?

21.1 m

Imagine you are confined to the floor of gymnasium that is 100 meters long and 75 meters wide. Starting at any one of the corners, what is your maximum possible displacement? - No limit - 75 meters - 125 m - 100 meters

125 m

A golfer hits a shot to a green that is elevated 2.50 m above the point where the ball is struck. The ball leaves the club at a speed of 18.2 m/s at an angle of 55.0 degrees above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air resistance, find the speed of the ball just before it lands

16.8 m/s

A tennis ball is struck and departs from the racket horizontally with a speed of 27.6 m/s. The ball hits the court at a horizontal distance of 18.5 m from the racket. How far above the court is the tennis ball when it leaves the racket?

2.20 m

A student sees a newspaper ad for an apartment that has 2230 square feet (ft^2) of floor space. How many square meters of area are there

207 m^2

Suppose a car is traveling at +20.0 m/s, and the driver sees a traffic light turn red. After o.525 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 6.00 m/s^2. What is the stopping distance of the car, as measured from the point where the driver first notices the red light?

43.8 m

A powerboat, starting from rest maintains a constant acceleration. After a certain time t, its displacement and velocity are r and v. At time 2t, what will be its displacement and velocity, assuming the acceleration remains constant? - 2r and 2v - 4r and 4v - 4r and 2v - 2r and 4v

4r and 2v

A neutron star has a mass of 2.0 x 10^30 kg (about the mass of our sun) and a radius of 5.0 x 10^3 m (about the height of a good-sized mountain). Suppose an object falls from rest near the surface of such a star. How fast would this object be moving after it had fallen a distance of 0.028 m? (Assume that the gravitational force is constant over the distance of the fall and that the star is not rotating)

5.5 x 10^5 m/s

Consider the value 0.000574 m. Which of the following choices correctly represents this quantity written in scientific notation? - 5.74 x 10^-4 m - 5.74 x 10^3 m - 0.574 x 10^3 m - 5.74 x 10^-3 m - 0.000574 m

5.74 x 10^-4 m

In diving to a depth of 365 m, an elephant seal also moves 410 m due east of his starting point. What is the magnitude of the seal's displacement?

549 m

While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.368. The pushing force is directed downward at an angle theta below the horizontal. When theta is greater than a certain value, it is not possible to move the box, no matter how large the pushing force is. Find that value of theta

69.8 degrees

A volleyball is spiked so that it has an initial velocity of 10.4 m/s directed downward at an angle of 45.7 degrees below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball?

7.26 m/s

A woman stands on a scale in a moving elevator. Her mass is 64.0 kg, and the combined mass of the elevator and scale is an additional 785 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9430 N. What does the scale read (in N) during the acceleration?

711 N

The Space Shuttle travels at a speed of about 8.46 x 10^2 m/s. The blink of an astronaut's eye lasts about 107 ms. How many football fields (length = 91.4 m) does the Space Shuttle cover in the blink of an eye?

9.90

Which of the following does NOT represent an inertial frame of reference? - A boat moving at a constant speed along a straight path - An airplane in straight and level flight at a constant speed - A skydiver falling straight downward at a constant (terminal) speed - A car going around a circular track at a constant speed

A car going around a circular track at a constant speed

Which of the following is an example of a vector quantity? - A car's speedometer and compass reading of 65 mi/h due east - A time of 7.9 s - An object's mass of 34 kg - A temperature of +20 degrees C - A car's speedometer reading of 65 mi/h

A car's speedometer and compass reading of 65 mi/h due east

In Case A, an object is moving in a straight line at a constant speed of 9.8 m/s. In Case B, an object is moving in a straight line with a constant acceleration of 9.8 m/s^2. Which of the following statements is true? - A nonzero net external force acts on the object in Case A only - A nonzero net external force acts on the object in both cases - A nonzero net external force acts on the object in neither case - A nonzero net external force acts on the object in Case B only

A nonzero net external force acts on the object in Case B only

An object is moving at a constant velocity. All but one of the following statements could be true. Which one cannot be true? - Two forces act simultaneously on the object - Three forces act simultaneously on the object - No forces act on the object - A single force acts on the object

A single force acts on the object

Which of the following is not a system of units used in measurements? - SI (System International) - CGS (Centimeter, Gram, Second) - BE (British Engineering) - ATT (Angles, Temperature, Time) - None of these is a system of units

ATT (Angles, Temperature, Time)

A box is at rest on the floor of an elevator. Because of static friction, a force is required to start the box sliding across the elevator floor. Compare the size of the pushing force required to move the box, when the elevator is (a) stationary, (b) accelerating upward, and (c) accelerating downward. Rank these forces from smallest to largest - Stationary, accelerating upward, accelerating downward - Accelerating upward, stationary, accelerating downward - Stationary, accelerating downward, accelerating upward - Accelerating downward, stationary, accelerating upward

Accelerating downward, stationary, accelerating upward

Which of the following describe non equilibrium conditions in the context applying Newton's laws of motion? - A spacecraft decelerating upon reentry into the atmosphere - A car accelerating through a traffic light - A ball falling off the roof of a house - A roller coaster going over the crest of a hill - All of the above

All of the above

Which of the following statements is/are true? - Physics is the most fundamental of all the branches of science - Physics is a very mature science, where its fundamental principles have been tested over many centuries and supported by empirical evidence from experimentation - Physics provides a framework for explaining the processes of the natural world - Physics research has had a significant impact on the development of new technologies, such as space travel, telecommunications, and medicine - All of the above statements are true

All of the above statements are true

Vector A points along the +y axis and has a magnitude of 100.0 units. Vector B points at an angle of 60.0 degrees above the +x axis and has a magnitude of 200.0 units. Vector C points along the +x axis and has a magnitude of 150.0 units. Which vector has the largest y component? - A - B - C

B

A body is moved from sea level to the top of a high mountain. Which of the following statements is/are true concerning the following quantities? I. The body's mass II. The body's weight III. The gravitational force on the body - Only II changes - Both II and III change - Only III changes - Both I and III change - Only I changes

Both II and III change

Vector A points along the +y axis and has a magnitude of 100.0 units. Vector B points at an angle of 60.0 degrees above the +x axis and has a magnitude of 200.0 units. Vector C points along the +x axis and has a magnitude of 150.0 units. Which vector has the largest x component? - A - B - C

C

Consider the following four vectors: F1 = 50.0 newtons, due east F2 = 10.0 newtons, due east F3 = 40.0 newtons, due west F4 = 30.0 newtons, due west Which two vectors add together to give a resultant with the smallest magnitude? - F1 and F2 - F1 and F3 - F1 and F4 - F2 and F3 - F2 and F4 - F3 and F4

F1 and F3

Consider the following four vectors: F1 = 50.0 newtons, due east F2 = 10.0 newtons, due east F3 = 40.0 newtons, due west F4 = 30.0 newtons, due west Which two vectors add together to give a resultant with the largest magnitude? - F1 and F2 - F1 and F3 - F1 and F4 - F2 and F3 - F2 and F4 - F3 and F4

F3 and F4

True or false? It is ok to add different units together, as long as they have the same dimensions. For example, while 25 mi and 12 km have different units, we can add them together (without conversion) since they both have the dimension of length

False

Note that all of the kinematic equations contain the initial velocity, v0. If a problem gives you three kinematic variables that do not include v0, and you are asked to find a variable other than v0, how should you proceed? - First, use the three given variables to obtain v0, and then use a second equation to find the unknown variable asked for in the problem - The problem statement must be incomplete - There must be implied information that was missed - There is not procedure, the problem is not solvable

First, use the three given variables to obtain v0, and then use a second equation to find the unknown variable asked for in the problem

A jogger runs along a straight and level road for a distance of 8.0 km and then runs back to her starting point. The time for this roundtrip is 2.0 h. Which one of the following is true? - Her average speed is 8.0 km/h, and her average velocity is 0 km/h - Her average speed is 8.0 km/h, but there is not enough information to determine her average velocity - Her average speed is 8.0 km/h, and her average velocity is 8.0 km/h

Her average speed is 8.0 km/h, and her average velocity is 0 km/h

A father and his seven-year-old daughter are facing each other on ice skates. With their hand, they push off against one another. Which of the following statements is/are true? I. Each experiences an acceleration that has a different magnitude II. Each experiences an acceleration that has the same magnitude III. Each experiences a pushing force that has a different magnitude IV. Each experiences a pushing force that has the same magnitude - I and IV only - I and III only - II and III only - II and IV only

I and IV only

Which of the following is/are true? I. Force is a scalar quantity II. Force is a vector quantity III. A force is a push or a pull between objects that occurs only when the objects are in physical contact IV. Non-contact forces are also called action-at-a-distance forces - II and IV only - II and III only - I only - II only - I and III only

II and IV only

Which of the following is/are true? I. Mass is a vector quantity II. Mass is a scalar quantity III. Mass is a measure of how much matter an object contains IV. There is no relationship between force and mass V. Isaac Newton developed three important laws of motion that describe the relationship between force and mass - II and III only - I and III only - II, III, and V only - II, IV, and V only - II, III, and IV only

II, III, and V only

A new car leaves a parking lot with its odometer indicating 23 miles. Two hours later it returns with an odometer reading of 123 miles. Which statement is true of the car's trip? - Its average speed was zero, its displacement was zero, and its average velocity was 50 mph - Its average speed was zero, its displacement was 100 miles, and its average velocity was 50 mph - Its average speed was 50 mph, its displacement was zero, and its average velocity was zero - Its average speed was 50 mph, its displacement was 100 miles, and its average velocity was zero

Its average speed was 50 mph, its displacement was zero, and its average velocity was zero

A car undergoes a constant deceleration (the acceleration is opposite to its velocity). Which statement is true of the car assuming a truly constant (negative) acceleration? - Its velocity will eventually pass through zero, reverse direction, and continue to accelerate in the opposite direction - It will not come to a halt, and will not reverse direction - It will eventually come to a permanent halt

Its velocity will eventually pass through zero, reverse direction, and continue to accelerate in the opposite direction

Three boys of equal strength try to break a rope (and fail) by tying one end to a fence post and tugging on the other end. Three additional boys (about the same strength as the others) come along and offer their assistance. Which of the following will maximize the tension in the rope? - Untie the rope from the post and have three boys tug on one end and the remaining three on the other (like a tug-of-war) - It does not matter: the rope sustains the same tension in both cases - Keep one end of the rope tied to the post and have all six boys tug on the other end

Keep one end of the rope tied to the post and have all six boys tug on the other end

Which of the following statements is true? - Newton's third law is also known as F = ma - Newton's third law is only valid for contact forces - Newton's third law states that for every acceleration of one object there is an equal but opposite acceleration of another object - Newton's third law is also known as the action/reaction law

Newton's third law is also known as the action/reaction law

Can two nonzero perpendicular vectors be added together so their sum is equal to zero?

No

Which one of the following is true, according to Newton's laws of motion? Ignore friction - A sports utility vehicle (SUV) hits a stationary motorcycle. Since it is stationary, the motorcycle sustains a greater force than the SUV does - A semitrailer truck crashes all the way through a wall. Since the wall collapses, the wall sustains a greater force than the truck does - Sam (18 years old) and his sister (9 years old) go ice skating. They push off against each other and fly apart. Sam flies off with the greater acceleration - Two astronauts on a space walk are throwing a ball back and forth between each other. In this game of catch the distance between them remains constant - None of these is true, according to the third law

None of these is true, according to the third law

Three particles have identical masses. Each particle experiences only the gravitational forces from the other two particles. How should the particles be arranged so that each one experiences a net gravitational force of the same magnitude? - On three of the four corners of a square - Equally spaced on a straight line - On the corners of a right triangle - On the corners of an equilateral triangle

On the corners of an equilateral triangle

three swimmers can swim equally fast relative to the water. they have a race to see who can swim across a river in the least time. swimmer A swims perpendicular to the current and lands on the far shore downstream, because the current has swept him in that direction. swimmer B swims upstream at an angle to the current, choosing the angle so that he lands on the far shore directly opposite the starting point. swimmer C swims downstream at an angle to the current in attempt to take advantage of the current. who crosses the river in the least amount of time? - Swimmer B - Swimmer C - All three swimmers cross the river in the same time - Swimmer A

Swimmer A

To attain its takeoff speed, the typical land-based takeoff distance for a certain fighter jet is 500 m. On an aircraft carrier, that same jet must takeoff at a reduced distance of 100 m, so the jet gets "assisted" by a steam-driven catapult. Assuming a constant acceleration in both cases, how does the magnitude of the acceleration of the jet when taking off from the carrier compare to its acceleration when it takes off from the land-based runway? - The acceleration for the aircraft carrier launch is 1/5 that of the land-based takeoff - The acceleration for the aircraft carrier launch is 5 times that of the land-based takeoff - The two accelerations must be exactly the same - The acceleration for the aircraft carrier launch is 25 times that of the land-based takeoff

The acceleration for the aircraft carrier launch is 5 times that of the land-based takeoff

Suppose you drive 1500 m due east in 2 minutes. You then turn due north and drive the same distance in the same time. Which of the following is true concerning the average speeds and average velocities for each segment of your trip? - The average speeds are the same, but the average velocities are different - The average speeds are the same, and the average velocities are the same - The average speeds are different, and the average velocities are different - The average speeds are different, but the average velocities are the same

The average speeds are the same, but the average velocities are different

You and a friend are standing on the edge of a cliff of height h. You throw a ball straight toward at the same time your friend throws a ball straight downward, off the edge. You both throw with the same initial speed, v0. Assuming the ball projected upward misses the edge of the cliff on the way down, which ball will hit the ground first, and which one will hit with greater velocity? - The ball projected downward will hit first and with the greatest velocity - The ball projected upward reverses course, catches up and passes the ball initially projected downward, and hits the ground first, and with the greatest velocity - The ball project downward will hit first, but the two will hit with equal velocities

The ball project downward will hit first, but the two will hit with equal velocities

Which of the following is true concerning the relationship between the total distance an object moves and the displacement of the object? - The total distance is always less than the displacement - The displacement will be less than or equal to the total distance - The displacement is always less than the total distance - The total distance and displacement are always equal - The total distance will be less than or equal to the displacement

The displacement will be less than or equal to the total distance

Considering that there are only three fundamental forces in nature from which all other forces can be derived, which of the three are responsible for the forces between atoms that hold solid materials together? - The electroweak force because the bonding in materials is carried out by electrons (electric charges) - It is the nuclear strong force between the nucleons in the nuclei of the atoms - It is the gravitational attraction (the gravitational force) between the atoms

The electroweak force because the bonding in materials is carried out by electrons (electric charges)

A square, four-legged table with a weight of 400 N rests on an even concrete floor. Assuming the weight is evenly distributed, what is the direction and magnitude of the normal force between the floor and each foot of the table? - The floor provides a normal force parallel to the floor on each leg with a magnitude of 100 N - The floor provides a normal force vertically upward (perpendicular to the floor) on each leg with a magnitude of 100 N - The floor provides a force parallel to the floor on each leg with a magnitude of 400 N - The floor provides a force vertically upward (perpendicular to the floor) on each leg with a magnitude of 400 N

The floor provides a normal force vertically upward (perpendicular to the floor) on each leg with a magnitude of 100 N

The phrase "it starts from rest" appears in statement of a kinematics problem regarding the motion of an object. What can you infer from this statement? - The final velocity of the object is zero - The initial velocity of the object is zero - The acceleration of the object is negative - None of the above

The initial velocity of the object is zero

A deer runs north 500 m, then turns south and runs 750 m. Which statement is true? - The magnitude of the displacement is zero - The magnitude of the displacement is less than the total distance traveled, and the resultant displacement vector points south - The magnitude of the displacement is equal to the total distance traveled, and the resultant displacement vector points north - The magnitude of the displacement is equal to the total distance traveled, and the resultant displacement vector points south

The magnitude of the displacement is less than the total distance traveled, and the resultant displacement vector points south

Vectors A, B and C satisfy the following equation A + B = C, and their magnitudes are related by the scalar equation A + B = C. How is vector A oriented with respect to vector B? - Vectors A and B can only be equal to zero - Vectors A and B are collinear and point in opposite directions - Vectors A and B are collinear and point in the same direction - Vectors A and B are perpendicular to each other - There is no way to tell the orientation of vectors A and B from the given information

Vectors A and B are collinear and point in the same direction

Suppose the coefficients of static and kinetic friction have values such that u(s) = 1.4(u(k)) for a crate in contact with a cement floor. Which of the following statements is true? - The magnitude of the static friction force on the crate is always 1.4 times as large as the kinetic friction force - The magnitude of the maximum static friction force on the crate is 1.4 times as large as the kinetic friction force - The magnitude of the kinetic friction force on the crate is always 1.4 times as large as the static friction force

The magnitude of the maximum static friction force on the crate is 1.4 times as large as the kinetic friction force

In which location does a 15-kg bowling ball have the smallest mass? - On the moon where the force due to gravity is less than on earth - The mass is the same everywhere - On Earth - In deep space where there is no force due to gravity

The mass is the same everywhere

The net external force acting on an object is zero. Which of the following statements is/are true? - The object can only be traveling with a velocity that is changing - The object can be either stationary or traveling with constant velocity - The object can only be stationary - The object can only be traveling with a constant velocity

The object can be either stationary or traveling with constant velocity

A stone is thrown from the top of a high cliff. Air resistance is negligible. As the stone falls, which of the following is true? - The stone is in equilibrium during the first half of its fall and then nonequilibrium for the second half - The stone is never in equilibrium as it falls

The stone is never in equilibrium as it falls

A rock is thrown vertically. What is true when the rock reaches its maximum height? - The velocity is zero, and the acceleration is zero - The velocity equals half its initial velocity, and the acceleration is -g - The velocity is zero, and the acceleration is -g - The velocity equals half its initial velocity, and the acceleration is zero

The velocity is zero, and the acceleration is -g

At t = 0, an object is moving with constant velocity in the xy-plane, where its velocity vector makes an angle of 45 degrees relative to the positive x-axis. The object then accelerates for 2 seconds in the positive y-direction only. After the 2 seconds, which of the following is true? - The velocity vector of the object is still directed at 45 degrees above the positive x-axis - The velocity of the object is zero - The velocity vector of the object is directed at an angle less than 45 degrees above the positive x-axis - The velocity vector of the object is directed at an angle greater than 45 degrees above the positive x-axis

The velocity vector of the object is directed at an angle greater than 45 degrees above the positive x-axis

Which statement is true regarding a jet moving at a constant speed of 450 mph in straight and level flight? - There is no net force acting on the jet - With no net force, the jet would eventually slow down - There is a net force acting on the jet, but only in the upward direction - otherwise it could not maintain flight - With no net force, the jet would lose altitude

There is no net force acting on the jet

In which one of the following situations could an object possibly be in equilibrium? - Three forces act on a single object. The force all point along the same line, but may have different directions - Two perpendicular forces act on an object - A single force acts on an object - None of the above

Three forces act on a single object. The forces all point long the same line, but may have different directions

True or false? If the magnitudes of both the x- and y-component of a vector are doubled, then the magnitude of the vector is also doubled

True

Below is a list of variables and their corresponding units x -> Meters (m) v -> Meters per second (m/s) t -> Seconds (s) a -> Meters per second squared (m/s^2) Consider the following relationship: t = sqrt(2x/a). Is this relationship dimensionally consistent? In other words, do the units on the left side of the equation match the units on the right side?

Yes

A cop gets a call indicating that a red sports car passed mile marker 3 on a highway with a speed limit of 60 mph. Exactly five minutes later the car passes the cop, who is sitting at mile marker number 9. Even though the cop's radar indicates that the car is going the speed limit, was the car speeding at any point between markers 3 and 9? - Yes, the car's average speed was 72 mph - No. There is no way to prove the driver broke the speed limit - Yes, the car was going at least 90 mph

Yes, the car's average speed was 72 mph

Of the four kinematic equations, is it possible to get two possible solutions from the same equation? If so, which ones? - No. One equation can never give two solutions - Yes. Only v = v0 + at - Yes. They all can give two solutions - Yes. Whenever one of the variables is squared, that equation may provide two possible solutions. There are two such equations: x = v0t + (1/2)at^2 and v^2 = v0^2 + 2ax

Yes. Whenever one of the variables is squared, that equation may provide two possible solutions. There are two such equations: x = v0t + (1/2)at^2 and v^2 = v0^2 + 2ax

You are standing on a scale and in a fast elevator that is taking you to the top of a tall building. The elevator slows as it reaches the top. What is true of you apparent weight as the elevator decelerates? - Your apparent weight is less than your true weight - Your apparent weight is equal to your true weight - Your apparent weight is greater than your true weight

Your apparent weight is less than your true weight

Consider the vector equation A + B = C. The component method of vector addition specifies that the scalar components of the resultant vector C are given by C(x) = A(x) + B(x) and Cy = A(y) + B(y). Which of the following would give the magnitude of the resultant vector C? - C(x) + C(y) - C(x) - C(y) - C(x)^2 + C(y)^2 - sqrt(C(x)^2 + C(y)^2) - None of the above

sqrt(C(x)^2 + C(y)^2)

A kinematics problem asks for the value of the acceleration and provides values for x, t, and the initial velocity. Which equation should you use? - v = v0 + at - x = (1/2)(v0 + v)t - v^2 = v0^2 + 2ax - x = v0t + (1/2)at^2

x = v0t + (1/2)at^2