Physics Final Exam Chapter 8, 7, 6, 5, 4, 3, 2, 1
A dog runs with an initial speed of 7.5 m/s on a waxed floor. It slides to a stop in 15 seconds. What is the acceleration?
-0.5 m/s^2
If the angular velocity of an object changes from 3 rad/s to 1 rad/s in 2 seconds, what is the object's angular acceleration?
-1 rad/s^2
A ball of clay is thrown at a wall at a velocity of 28.0 m/s. After it hits the wall, it takes 0.020 s to stop. What is the acceleration of the clay when it hits the wall?
-1400 m/s^2
What is the distance the masses on the right of the fulcrum need to be to balance with the two masses on the left?
.39 m
A 10 kg toy truck moves at 5 m/s East. It collides head on with a 5 kg toy car moving 10 m/s West. What is the total momentum of the system?
0 kg m/s
The graph shows the force on an object of mass M as a function of time. For the time interval 0 to 4 seconds, the total change in the momentum of an object is...
0 kg m/s
If a boomerang is thrown 20 m in a straight line it with her is exactly to the spot it was thrown what is its displacement?
0 m
A passenger at the rear of a train traveling at 15 m/s relative to the ground throws a baseball with a speed of 15 m/s in the direction opposite the motion of the train. What is the velocity of the baseball relative to the ground as it leaves the thrower's hand? In other words: how fats does a person of the ground see the ball move?
0 m/s
If you throw a baseball straight up, what is it's velocity at the highest point?
0 m/s
What is the horizontal acceleration of a projectile?
0 m/s^2
What is the speed of an object at rest?
0.0 m/s
The given graph shows the relationship between gravitational potential energy and height. If they mechanical energy at point A = 0.49 what is the kinetic energy?
0.01 J
A 0.250 kg cart moving at 0.400 m/s has how much momentum?
0.1 kg m/s
A ball has 17 J of kinetic energy and it's mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?
0.26m
An object completes 1.5 circular orbits in half a minute. What is its approximate angular velocity?
0.30 rad/s
In a physics experiment, two carts of mass 1.5 kg each a rolled towards each other. The orange cart as a velocity of 2 m/s and the blue cart has a velocity of -1 m/s. The carts stick together when they collide. Calculate the final speed.
0.5 m/s
A ball is thrown horizontally at a height of 2.2 meters at a velocity of 65 m/s. Assume no air resistance. How long until the ball reacges te ground?
0.67 seconds
An 800N man is playing on a seesaw with his son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw?
0.75m
When a pendulum swings at is potential energy at its greatest?
1
A fishing boat with a maximum speed of 3 m/s relative to the water is in a river that is flowing at 2 m/s. What is the minimum speed boat can obtain relative to the shore?
1 m/s
A train is traveling 50 m/s North on a track. A passenger on the train walks to the bathroom 1 m/s to the north. What is the speed of the passenger relative to the train?
1 m/s
A dog sits 1.5 m from the center of a merry-go-round. The merry-go-round is set in motion, and the dog's tangential speed is 1.5 m/s. What is the magnitude of the dogs centripetal acceleration?
1.5 m/s^2
If the translational velocity of an object is 3 m/s, and is located a distance of 2 m from the axis of rotation, what is the objects angular velocity?
1.5 rad/s
Write the answer in scientific notation. 5 x 10^8 - 3.4 x 10^8
1.6 x 10^8
Is the walker's speed with respect to the train?
10 mph
Fred kicks a ball with a force of 20 N to George, who is 5 m away. How much work was done to the ball?
100 J
In practice A of the figure, what is the magnitude of the resultant displacement?
11 km
If I throw a crayon straight up at 12 m/s, how fast is it speed when I catch it at the same height?
12 m/s
Find the missing side.
12.1
What is the net force of: <—-100N—- ——-230N——->
130N to the right
If the torque required to loosen a nut on the wheel of a car has a magnitude of 40.0 Nm, what is the minimum force must be exerted by the mechanic at the end of a 0.300 m wrench to loosen a nut?
133 N
If the torque required to loosen a nut on the wheel of a car has a magnitude of 60 Nm, what minimum
133.3 N
A diagram of force is being applied to box by four people is illustrated below. If the net force acting on the box is 10 N to the right, what is the magnitude of the force applied by the box pulling to the left?
14N
150 J of work is needed to move a box 10 m, what force was used?
15 N
Calculate the torque produced by 75 N perpendicular force at the end of a 0.20m long wrench.
15 Nm
A roller coaster accelerates with an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What is the acceleration?
16 m/s^2
If 68 joules were used to move a form in crate, how far was the crate moved?
17m
A plane traveling north at 150 m/s is flying towards a runway. A crosswind of 30 m/s begins to blow from the east. The pilot realizes he's being blown off course. At what angle must he head in order takes to travel directly north?
19 degrees east of north
If a car moves 12 km north, 19 km east, and 12 km south, what is its displacement?
19 km east
If you drop a banana, how fast is it going after 2 seconds?
19.6 m/s
In diagram two if the 600 kg cart is initially at rest, what is it velocity at point B? PICTURE
19.8 m/s
Object at rest will stay at rest and an object in motion will stay in motion unless acted upon by another force. Which one of Newton's Laws of Motion is this?
1st Law of Motion
Determine the number of significant figures in the following measurement: 4500 g
2
If a 120 kg lineman moving at -2 m/s tackles and 80 kg fullback moving and +8 m/s. If the fullback's velocity after they collide is +2 m/s what is the lineman's velocity?
2 m/s
Two football players with mass 75 kg and 100 kg run directly toward each other with speed of 6 m/s and 8 m/s respectively. If they grow each other as they collide, the combined speed of the two players just after the collision would be...
2 m/s
The picture shows to exoplanets, b and c. The mass and radius of each planet is given in terms of M and r. What is the surface gravity on planet c if the surface gravity on planet b is 4 m/s^2?
2 m/s^2
Calculate the density of the stone using the data in the table. Make sure your answer has the correct number of significant figures.
2.33 g/mL
Calculate the velocity of an object moved around a circle with a radius of 1.65 m and acceleration of 3.5 m/s^2.
2.4 m/s
Calculate the mass of an object if it took a 20 N of force to rotate it in a circle with a radius of 2 m and a velocity of 4 m/s.
2.5 kg
If 40 N of force is applied to a roller coasters 10 kg cart over a distance of 15 m, how much work is done?
2000 J
If Jay Loppy pushes his van 20 m how much work is done?
2000 J
A bicycle has a speed of 6 m/s. What is the speed in kilometers per hour?
21.6 km/h
A dog and a cat are at a standoff, running toward each other, both at 12 m/s. What is the magnitude of velocity of the cat relative to the dog?
24 m/s
You know 1000 mg = 1 g. Convert 2.5 grams into milligrams.
2500 mg
In practice A of the figure, what is the direction of the resultant displacement?
27 degrees north of west
In diagram two, if the mass of the cart is 600 kg, what is the change in potential energy from point A to point B?
294,000 J
Determine the number of significant figures in the following measurement... 9.03 mL
3
Determine the number of significant figures in the following measurement: 0.230 m
3
When a pendulum swings at which point is kinetic energy at its greatest?
3
Divide: (6.9 x 10^7) / (2.3 x 10^-3)
3 x 10^10
Multiply: (9.4 x 10^6) (3.2 x 10^5)
3.008 x 10^12
A horse trots past a fencepost located 12m to the left of a gatepost. It then passes another fencepost located 24m to the right of the gatepost 11s later. What us the average velocity of the horse?
3.3 m/s^2
A golf ball accelerates off a tee at 15 m/s^2, changing its velocity from 0 m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?
3.3 s
A chemist measured the amount of caffeine in a new energy drink called FlipOUT to be 84.20 mg. The correct amount of caffeine is 87.10 mg. Calculate the percent error. Percent error = [(accepted value - experimental value) / accepted value][100]
3.3%
Calculate the product of 123000 m and 3234 m. Give your answer with the appropriate number of significant figures.
3.98 x 10^8 m
What is the walker's speed from the observer's perspective?
30 mph
Calculate 345.009 g - 23.00 g and give your answer with the correct number of significant figures.
322.01 g
A motorboat velocity is 20 km/h in stillwater. If the boat must travel straight to the nearest shore in a river whose current is 12 km/h. What upstream angle must the bow boat points at?
37 degrees upstream
Calculate the torque produced when 75.0 N force when a pipe extends the length of the wrench to 0.500 m.
37.5 Nm
A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?
375 kg m/s
What is the simplified version of: 5.2 x 10^13 / 1.3 x 10^7
4 x 10^6
Multiply (3.5 x 10^5)(1.2 x 10^-3)
4.08 x 10^2
If the torque required to loose a nut on the wheel of a car has a magnitude of 85.0 Nm, what minimum 65 degrees from the perpendicular force must be exerted by a mechanic at the end of a 22.0 cm wrench to loosen the nut?
426.3 N
Which angle will produce the greatest range (in the absence of air resistance)? a. 90 degrees b. 0 degrees c. 45 degrees d. None of these
45 degrees
8N to the left and 4N to the right. Find the net force. Is this balanced?
4N left; no
What is the length of the screw?
5 cm
A 3000 kg truck moving at +10 m/s hits a 1000 kg parked car which moves off at +15 m/s. What is the velocity of the truck?
5 m/s
A fishing boat with a maximum speed of 3 m/s relative to the water is in a river that is flowing at 2 m/s. What is the maximum speed the boat can obtain relative to the shore?
5 m/s
A car starts from rest at a stop light and reaches 20 m/s in 3.5 seconds. Determine the acceleration of the car.
5.7 m/s^2
Convert 65 mph into ft/min. 1 mi = 5280 ft 1 hr = 60 min
5.7 x 10^3
Write the answer in scientific notation. 4.1 x 10^5 + 5.5 x 10^6
5.91 x 10^6
A car travels 90 m due North in 15 seconds. Then the car turns around and travels 40 m due south. What is the magnitude and direction of the resultant cars displacement?
50 meters north
How many minutes are in a year?
525,600 minutes
The illustration below shows a cart with different amounts of force being applied. What is the net force on the car and in which direction is it?
5N to the right
A boy kicks a football with a force of 20N, the time the force acts for is 0.3 s. Calculate the impulse on the ball.
6 Ns
A motorboat, which has a speed of 5 m/s in Stillwater, is crossing a river (from west to east). The river's current is flowing south at 3.3 m/s. What is the magnitude of the boats resultant velocity with respect to the starting point?
6.0 m/s
A newly discovered exoplanet has triple the mass and double the radius as compared to earth. What is the approximate surface gravity on this exoplanet?
7.5 N kg
If the mystery machine moves 100 m how much work is done?
70,000 J
A large box slides across a frictionless surface with a velocity of 12 m/s and a mass of 4 kg, collides with a smaller box with a mass of 2 kg that is stationary. The boxes stick together. What is the velocity of the two combined masses after collision?
8 m/s
While playing pool, the white cue ball strikes the 8 ball. Before the collision, cue balls velocity is 10 m/s in the 8 ball is at rest. If both balls have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 balls velocity?
8 m/s
A wheel starts from rest and rotates with a constant angular acceleration about a fixed axis. It completes the first revolution in six seconds after it starts. How long after it started will the wheel complete the second revolution?
8.5 seconds
How much work is being done with 200 N of force over 426 m?
85,200 J
A box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest. Find the acceleration.
9 m/s^2
Convert 9 km to mm
9,000,000
A car traveling at 15 m/s on a flat road rounds a curve with a radius of 25 m. What is the centripetal acceleration of the car?
9.0 m/s^2
If you throw a baseball straight up, what is its acceleration at the highest point?
9.8 m/s^2
The acceleration due to gravity near the surface of Earth is equal to...
9.8 m/s^2
What is the vertical acceleration of a projectile?
9.8 m/s^2
Which angle will produce the greatest height (absence of air resistance)? a. 45 degrees b. 0 degrees c. 90 degrees d. None of these
90 degrees
Which graph represents the greatest acceleration?
A
Which of the following situations represents a negative displacement? (Assume positive position is measure vertically upward along the y-axis.)
A cat jumps from a tree limb to the ground.
Which is an example of someone using a simple machine to do work?
A mother pushes a stroller up the ramp
What is force?
A push or pull exerted on an object
Which type of simple machine would be found on the bottom of a wagon?
A wheel and axle
The picture of the position vs. time graph shows an object that is...
Accelerating/speeding up
What type of unit is 12 cm/s^2?
Acceleration
How close a measurement is to the accepted value is called...
Accuracy
Which are simultaneous equal but opposite forces resulting from the interaction of two objects?
Action-reaction pairs
How do you combine vectors if they are in the same direction?
Add
What is the ratio for cosine?
Adjacent/Hypotenuse
Name the missing force.
Applied force
The easiest way to open a heavy door is by applying the force...
At the edge of the door far from the hinges
Which graph shows the object standing still?
B
Which of the following graphs shows how the mass of an object affects the amount of force needed to move it?
B
Which of the following ranks the tensions in the strings from highest to lowest?
B>D>C>A
Why do objects experience centripetal acceleration?
Because they are constantly changing direction and the net change is directed inward
If a nonzero net force is acting on an object, then the object is definitely....
Being accelerated
The illustration shows the forces in newtons acting on three different blocks. Which boxes will move under these conditions?
Blocks 2 and 3
If a bullet is horizontally shot at the same moment another is dropped from a bucket at the same height, which has a larger vertical speed when they hit the ground?
Both
A particle P is moving in a circle with uniform speed. Which of the following diagrams correctly shows the direction of the acceleration and velocity of the particle at one instance of time?
C
The graph at right describes the motion of the ball. At what point does the ball have an instantaneous velocity of zero?
C
Which graph demonstrates the greatest positive speed?
C
Which of the following depicts the speed of the bowling ball?
C
The measure of confidence in a measurement or result.
Certainty
Students are investigating how mass affects the force needed to move an object. They attached a wooden block to a spring scale and placed a 10 g mass on top of the block and pulled it 50 cm across the table. What changes to their set up would result in a larger force reading on the spring scale?
Changing the mass to a larger amount
All of the parts that a vector is broken into...
Component vector
An experiment that tests only one factor at a time by using a comparison of a control group with an experimental group.
Controlled Experiment
Which graph represents zero acceleration (constant velocity)?
D
If you know a car's acceleration, the information you must have to determine if the car's velocity is increasing is the...
Direction if the car's initial velocity
When the speed of an object is doubled, its momentum...
Doubles
What is force?
Either a push or a pull
Energy from a compressed spring would be example of what?
Elastic
In this type of collision, objects tend to "bounce" off each other.
Elastic
What does work transfer?
Energy
Law of conservation of energy states...
Energy cannot be created or destroyed, it can only be transformed
The total momentum before a collision is ________ the total momentum after a collision.
Equal to
What are some of the advantages of measured data being depicted in an equation?
Equations being useful for describing relationships between variables, or for use in predicting results
A beam with a length of L is lifted from one end with a force of F1. If the beam doubles in length but contains the same mass, what will the force required to lift be in terms of F1?
F1/2
When there is no air resistance, objects of different masses dropped from rest...
Fall with equal acceleration and with equal displacements
T/F The more mass an object has, the faster it will fall.
False
Objects that are falling toward earth in free fall move...
Faster and faster
Which force exists between objects even in the absence of direct physical contact?
Field force
A push and/or a pull
Force
What causes an object to change direction?
Force
What is the cause of acceleration?
Force
Two factors that determine work are...
Force and distance
A free body diagram does not represent...
Force is exerted by the object
What force does not cause any torque?
Force perpendicular to the fulcrum.
The state that exists when the only force acting on an object is gravity is called...
Free fall
A force that results from two objects rubbing past each other.
Friction
What force ultimately slows the roller coaster to a stop?
Friction
Name the missing force.
Frictional force
Energy of a rock perched on a cliff is an example of which type of energy?
Gravitational
The force that pulls objects towards earth.
Gravity
The force that pulls things toward earth.
Gravity
What force keeps planet in orbit around the sun?
Gravity
Which statement describes a vector? a. Has direction but no magnitude b. Has magnitude but no direction c. Has a constant magnitude but no direction d. Has both magnitude and direction
Has both magnitude and direction
Gravitational potential energy depends on ________ and ________ of an object.
Height and mass
This bullseye demonstrates...
High accuracy and high precision
When a measurement is repeatable and consistent it is said to have...
High precision
An explanation that is based on prior scientific research or observations and that can be tested
Hypothesis
What type of simple machine is found on the floor of a bathtub?
Inclined plane
Softer landings tend to...
Increase collision time
In this type of collision objects tend to "stick" together.
Inelastic
What is the tendency of an object to maintain its state of motion?
Inertia
When an object resists change, like a body in a turning car, it is called....
Inertia
The slope of a line drawn tangent to a point on the curve of a position versus time graph describes what concept?
Instantaneous velocity
What happens to an object's speed as the radius decreases?
It decreases
What happens to the velocity of a ball as it is dropped off a cliff?
It increases at a uniform rate
Why does a car accelerate as it rounds a corner at a constant speed?
It's direction changes
What is the SI unit for work?
Joules
Energy due to motion is what type of energy?
Kinetic
Energy of motion is what type of energy?
Kinetic
The energy of movement is what type of energy?
Kinetic
In the diagram above, two masses, one with mass m, the other with mass M = 2m are resting on a uniform plank of length L that pivots at its midpoint. If the mass m is at the far end of the plank, how far away from the pivot should the mass M be to balance the plank in a horizontal position shown?
L/4
In this class, we have defined science as...
Learning by discovery
This bullseyes demonstrates...
Low accuracy and high precision
The length of a force vector represents the...
Magnitude of the force
The unit we use to measure acceleration is...
Meters/second/second
A system of measurement in which all units of a given dimension are related to each other by powers of 10. The main one used today is the SI.
Metric System
A pattern, plan, representation, or description designed to show the structure or workings of an object, system, or concept.
Model
The faster an object moves, the ________ kinetic energy is has.
More
The SI unit of force is...
Newton
What is the unit called that measures force?
Newton
Force =ms is the formula from
Newton's Second Law
Object will accelerate in the direction of the force applied to it. This involves which of Newton's Laws of Motion?
Newton's Second Law
What states "For every action there's an equal and opposite reaction."?
Newton's Third Law
Units of force or measured in what?
Newtons
What is the unit for torque?
Nm
You are walking in a straight line at a consistent speed. Do you have an acceleration?
No
What are the units of the coefficient of friction?
No unit
A seesaw with mass x perfectly balanced with a fulcrum in the center. If mass x changes uniformly does the net torque change?
No, because it is balanced that means the net torque is zero, a uniform increase in weight keeps it balanced keeping the net torque at zero.
Is torque independent of the location of the origin?
No, you always need to specify the origin.
What are some of the advantages of measured data being depicted in a table?
Organized way, to display data, and using it to identify relationships or trends
How do you calculate power?
P= W/t
Scientists use the scientific method to look for...
Patterns
The study of matter and energy and interactions between the two through forces and motion.
Physics
Is the distance on a round-trip positive, negative, or zero?
Positive
Energy that is stored is called...
Potential
What type of energy is in this picture?
Potential
When you shut your rubber band, you are storing what type of energy?
Potential
It is a measure of how close measurements come to each other when they are made in the same way.
Precision
How do you combine vectors if they are at a right angle to each other, and you know two sides?
Pythagorean theorem
The _____ of two or more vectors is the sun of the vectors.
Resultant
The earth completes one of these every 365.25 days.
Revolution
The moon ________ around the earth.
Revolves
Earth and moon ________ on an axis.
Rotate
The global scientific method system. The abbreviation stands for the French name Systemé International d'Unités
SI
The picture shows two identical satellites, A and B, in circular orbits around the earth. Upon which satellite does the earth exert a stronger gravitational force?
Satellite B
Is this a scalar quantity or a vector quantity: Wind blowing at 20 knots
Scalar
Science comes from the Greek word...
Scientia
A series of steps used by scientists to solve a problem or answer a question.
Scientific Method
What type of simple machine is found on the cap of a pickle jar?
Screw
The scientist who is most famous for developing the laws of motion is....
Sir Isaac Newton
Determine the motion of the car
Slowing down
Suppose you are designing an engineless car for a downhill coasting race. What type of wheels would be the best?
Solid disks
Velocity is both ______ and ______.
Speed and direction
What type of unit is 30 m/s?
Speed or velocity
Determine the motion if the car
Speeding up
Which is NOT a type of simple machine? wedge, pulley, spring, screw
Spring
How do you combine vectors if they are in opposite directions?
Subtract
A set of particles or interacting components considered to be a distinct physical entity for the purpose of study.
System
What is meant by the SI system?
Systeme Internationale
What is correct about the acceleration of an object?
The acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object.
When a car's velocity is positive and it's acceleration is negative, what is happening to the car's motion?
The car slows down.
What happens to the total distance that a ball travels as it falls off the side of a cliff?
The distance increases at a non uniform rate.
The illustration shows all the forces and newtons acting on the box. The sum of all the forces acting on the box results in a force acting on the box.
The right with the strength of 11 N
The illustration shows all the forces in newtons acting on the box. The sum of all the forces acting on the truck results the force acting on the truck.
The right with the strength of 40 N
An object is projected horizontally from a cliff. The time it takes to hit the ground is...
The same amount of time than if it was dropped
A radian is all of the following except: a. a dimensionless quantity b. the ratio of arc length over radius c. the same as degrees d. the unit for rotational position
The same as degrees
You apply force to a wrench to tighten a bolt. The wrench breaks in half. Select the best answer for what happens next. Assume the force applied remains constant.
The torque is now half of what is was because torque and distance are directly proportional.
What is a characteristic of a simple machine?
They have few or no moving parts.
If a bullet is horizontal shot at the same moment another bullet is dropped from the same height, which will hit the ground first?
They will hit at the same time
Which would hit the ground first is dropped from the same height in a vacuum: a feather or a metal bolt?
They would hit the ground at the same time.
A screw is made up of _________ wrapped around a post or rod.
Threads
The illustration shows the forces in newtons acting on each group. Which direction will the groups move under these conditions?
To the right 2N
In any collision the ________ is always constant.
Total momentum
What is work?
Transfer of energy by force to move an object
T/F Energy cannot be created or destroyed, only converted from one form to another.
True
True or False: Speed and velocity are measured in the same SI unit.
True
True or False: Torque is the product of a force exerted on an object times the lever arm.
True
Newton's third law of motion involves the interactions of...
Two objects and two forces
How does the speed in Case A compared to the speed in Case B?
Two times
What are some of the advantages of measured data being depicted in a graph?
Useful for identifying mathematic relationships such as correlation or proportionality
Is this a scaler quantity or a vector quantity: Deer running 15 m/s due West
Vector
If two objects collide and stick together, what will happen to their velocities?
Velocities will decrease
A bigger fish swims upon and swallows a small fish at rest. After lunch, the big fish has less....
Velocity
Acceleration is a change in ________.
Velocity
At which point is potential energy greatest?
W
How do we calculate work?
W = Fd
A change in the gravitational force acting on an object will affect the object's....
Weight
The magnitude of the gravitational force acting on an object is...
Weight
A force exerted over a distance to move an object is...
Work
Is the formula for work?
Work = force x distance
In the graph above, a toy car rolls from +3 m to +5m. Which if the following statements is true?
Xi= +3m
At which point is kinetic energy greatest?
Y
You are walking and start to slow down. Do you have acceleration?
Yes
Does a bridge anchored resting on two pillars have any torque?
Yes, but it is at equilibrium.
Is the displacement on a round-trip positive, negative, or zero?
Zero
The force that is necessary to keep the bucket swinging in a circle is called the...
centripetal force
What is the relationship between centripetal force and the mass of an object?
direct relationship
This picture shows which type of collision?
elastic collision
While playing pool, Emma notices that the pool balls bounce apart. What type of collision is this?
elastic collision
Jorge noticed a collision outside the coffee shop where two cars collided and stuck together. What kind of collision did he observe?
inelastic collision
The picture shows what type of collision?
inelastic collision
When an object is experiencing a net torque...
it is rotating
Units of work are what?
joules
Newman is equivalent to which quantities?
kg m/s^2
The measure of the quantity of matter is....
mass
Force depends on...
mass and acceleration
The momentum of an object depends on an object's ________ and ________
mass and velocity
Linear momentum is defines as the product of a system's ________ multiplied by its ________.
mass; velocity
Average speed is measured in...
meters per second (m/s)
Name the missing force.
normal force
What is the ratio for sine?
opposite/hypotenuse
The law of conservation of momentum states that...
p before is the same as p after
A box slides across a perfectly smooth floor at a constant velocity. (The phrase perfectly smooth suggests that there is no friction). Forces act on the box?
tension, gravity, normal force
The difference between a car hitting a wall and a car hitting a hay stack is...
the collision time of the car hitting the hay stack is greater
Acceleration is defined as...
the rate of change of velocity
Which of these is not a vector quantity? a. velocity b. displacement c. time d. acceleration
time
Centripetal acceleration is the acceleration...
towards the center of a circle
Acceleration is defined as the change in...
velocity divided by the time interval
Following quantities are vectors: a. Length, mass, time b. velocity, acceleration, force c. force acceleration, mass d. speed, velocity, acceleration
velocity, acceleration, force
What is the SI unit for power?
watts
What is the measurement of power?
watts
What two parts make a pulley?
wheel and wire
A car goes forward along a level road at a constant velocity. The additional force needed to bring the car into equilibrium is...
zero