physics test

The figure above shows the path of a ball tossed from a building. Air resistance is ignored. In the figure above, at which point is the ball's speed about equal to the speed at which it was tossed? Select one: a. C b. B c. D d. A

A. C

A baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball's path does it experience zero velocity and nonzero acceleration at the same time? Select one: a. at the top of its path b. midway on the way up c. the instant it leaves the catcher's hand d. the instant before it arrives in the catcher's mitt

A. at the top of its path

You are throwing a ball for the second time. If the ball leaves your hand with twice the velocity it had on your first throw, its horizontal range R (compared to your first serve) would be Select one: a. four times as much. b. half as much. c. 1.4 times as much. d. twice as much.

A. four times as much

Two objects are thrown from the top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the street? Select one: a. They are traveling at the same speed. b. The one thrown up is traveling faster. c. The one thrown down is traveling faster. d. It is impossible to tell because the height of the building is not given.

A. they are traveling at the same speed

Two balls are thrown horizontally. Ball C is thrown with a force of 20 N, and ball D is thrown with a force of 40 N. Assuming all other factors are equal, ball D will fall toward the ground Select one: a. faster than ball C. b. at the same rate as ball C. c. more slowly than ball C. d. at a rate that cannot be compared with that of ball C using the information given.

B. at the same rate as ball C

What is the SI unit of acceleration? Select one: a. m^2/s b. m/s^2 c. m/s d. m·s^2

B. m/s^2

A ball is thrown vertically upward with a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first ball?) Select one: a. 1.7:1 b. 1.4:1 c. 2:1 d. 4:1

D. 4:1

When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? Select one: a. Neither its acceleration nor its velocity is constant. b. Its velocity is constant. c. Both its acceleration and its velocity are constant. d. Its acceleration is constant.

D. its acceleration is constant

A hunter on level ground fires a bullet at an angle of 10 degrees above the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first? Select one: a. depends upon the caliber of the bullet b. Both hit at the same time. c. the fired one d. the dropped one

D. the dropped one

At what angle should a water-gun be aimed in order for the water to land with the greatest horizontal range? Select one: a. 45° b. 0° c. 30° d. 60°

a. 45°

A stone is thrown horizontally from the top of a cliff. One second after it has left your hand, its vertical distance below the top of the cliff is Select one: a. 5 m. b. 0 m c. 10 m. d. 15 m.

a. 5 m.

The driver of a car traveling at 110 km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a complete stop in 4.5 s. What is the average acceleration of the car during braking? Select one: a. 6.79 m/s2 b. 24.4 m/s2 c. 13.6 m/s2 d. 138 m/s2

a. 6.79 m/s2

Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.) Select one: a. A cat jumps from a tree limb to the ground. b. A cat stands on a tree limb. c. A cat jumps from the ground onto a tree limb. d. A cat jumps from a lower tree limb to a higher one.

a. A cat jumps from a tree limb to the ground.

A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is coming down. Select one: a. Both its velocity and its acceleration point downward. b. Both its velocity and its acceleration point upward. c. Its velocity points downward and its acceleration points upward. d. Its velocity points upward and its acceleration points downward.

a. Both its velocity and its acceleration point downward.

The graph above describes the motion of a ball. At what point is the speed of the ball equal to its speed at B? Select one: a. D b. A c. none of the above d. C

a. D

Which of the following statements applies to the motion of a ball rising and then falling in free fall? I. The ball has constant acceleration as it moves upward. II. The ball has constant acceleration at the top of its path. III. The ball has constant acceleration as it moves downward. Select one: a. I, II, and III b. I and III c. III only d. I only

a. I, II, and III

bullet is fired horizontally, and at the same instant a second bullet is dropped from the same height. Ignore air resistance. Compare the times of fall of the two bullets. Select one: a. They hit at the same time. b. cannot tell without knowing the masses c. The dropped bullet hits first. d. The fired bullet hits first.

a. They hit at the same time.

Suppose a ball is thrown straight up. What is its acceleration just before it reaches its highest point? Select one: a. exactly g b. slightly less than g c. zero d. slightly greater than g

a. exactly g

Suppose you are given a position versus time graph. The slope of a line drawn tangent to a point on the curve of this graph describes what quantity? Select one: a. instantaneous velocity b. displacement c. position d. acceleration

a. instantaneous velocity

The diagram below shows the trajectories of two balls. The magnitude of the initial velocity is vi, the launch angle is q, and the horizontal and vertical components of the initial velocity are vxi and vyi. Compare the values of vi. The value for ball A Select one: a. is greater than the value for ball B. b. is less than the value for ball B. c. is equal to the value for ball B. d. cannot be compared with the value for ball B using only the information given.

a. is greater than the value for ball B.

The graph above describes the motion of a ball. At what point is the velocity of the ball equal to its velocity at B? Select one: a. none of the above b. A c. C d. D

a. none of the above

Which of the following is the motion of objects moving in two dimensions under the influence of gravity? Select one: a. projectile motion b. directrix c. horizontal velocity d. vertical velocity

a. projectile motion

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the difference in their speeds Select one: a. remains constant. b. increases. c. decreases. d. cannot be determined from the information given.

a. remains constant

Acceleration is defined as Select one: a. the rate of change of velocity. b. the rate of change of displacement. c. a rate of displacement. d. the change in velocity.

a. the rate of change of velocity.

The path of a projectile through space is called its: Select one: a. trajectory b. torque c. range d. equilibrant

a. trajectory

A ball is thrown up from street level and returns to its original height as shown in the graph below. What is the acceleration of the ball at 3s?. Select one: a. 30 m/s2 b. -9.8 m/s2 c. -30 m/s2 d. 0 m/s2

b. -9.8 m/s2

According to the graph above, during which interval does the cat have the greatest positive velocity? Select one: a. 5.0-10.0 s b. 0.0-5.0 s c. 15.0-20.0 s d. 10.0-15.0 s

b. 0.0-5.0 s

An object is dropped and freely falls to the ground with an acceleration of 1 g. If it is thrown upward at an angle instead, its acceleration will be Select one: a. 0 g. b. 1 g downward. c. larger than 1 g. d. none of these e. 1 g upward.

b. 1 g downward.

An object is dropped and freely falls to the ground with an acceleration of 1 g. If it is thrown upward at an angle instead, its acceleration will be Select one: a. none of these b. 1 g downward. c. 0 g. d. larger than 1 g. e. 1 g upward.

b. 1 g downward.

According to the graph above, the cat has the fastest speed during which interval? Select one: a. 0.0-5.0 s b. 10.0-15.0 s c. 5.0-10.0 s d. 15.0-20.0 s

b. 10.0-15.0 s

According to the graph above, during which interval is the cat at rest? Select one: a. 0.0-5.0 s b. 5.0-10.0 s c. 15.0-20.0 s d. 10.0-15.0 s

b. 5.0-10.0 s

The figure above shows the path of a ball tossed from a building. Air resistance is ignored. In the figure above, the magnitude of the ball's velocity is least at location Select one: a. A. b. B. c. D. d. C.

b. B.

The figure above shows the path of a ball tossed from a building. Air resistance is ignored. In the figure above, the magnitude of the ball's velocity is greatest at location Select one: a. C. b. D. c. A. d. B.

b. D.

Suppose a ball is thrown downward in the absence of air resistance. Make a statement concerning its acceleration. Select one: a. Its acceleration is zero. b. Its acceleration is constant. c. Its acceleration is constantly increasing. d. Its acceleration is constantly decreasing.

b. Its acceleration is constant.

When a car's velocity is positive and its acceleration is negative, what is happening to the car's motion? Select one: a. The car travels at constant speed. b. The car slows down. c. The car remains at rest. d. The car speeds up.

b. The car slows down.

If you run a complete loop around an outdoor track (400 m), in 100 s, your average velocity is Select one: a. 0.25 m/s. b. 40,000 m/s. c. zero. d. 4.0 m/s.

c. zero.

Which would hit the ground first if dropped from the same height in a vacuum-a feather or a metal bolt? Select one: a. They would be suspended in a vacuum. b. They would hit the ground at the same time. c. the feather d. the metal bolt

b. They would hit the ground at the same time.

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them Select one: a. cannot be determined from the information given. b. increases. c. remains constant. d. decreases.

b. increases

The graph above describes the motion of a cyclist. The graph illustrates that the acceleration of the cyclist Select one: a. increases. b. is constant. c. is zero. d. decreases.

b. is constant.

The diagram below shows the trajectories of two balls. The magnitude of the initial velocity is vi, the launch angle is q, and the horizontal and vertical components of the initial velocity are vxi and vyi. Compare the values of vyi. The value for ball A Select one: a. is equal to the value for ball B. b. is greater than the value for ball B. c. is less than the value for ball B. d. cannot be compared with the value for ball B using only the information given.

b. is greater than the value for ball B.

Roll a bowling ball off the edge of a table. As it falls, its horizontal component of velocity Select one: a. increases. b. remains constant. c. decreases. d. is always zero

b. remains constant.

Two projectiles are fired from ground level at equal speeds but different angles. One is fired at an angle of 30 degrees and the other at 60 degrees. The projectile to hit the ground first will be the one fired at (neglect air resistance) Select one: a. 60 degrees b. depends on the mass of the projectiles c. 30 degrees d. they hit at the same time

c. 30 degrees

An Olympic athlete throws a javelin at four different angles above the horizontal, each with the same speed: 30°, 40°, 60°, and 80°. Which two throws cause the javelin to land the same distance away? Select one: a. 40° and 80° b. 40° and 60° c. 30° and 60° d. 30° and 80°

c. 30° and 60°

The driver of a car traveling at 110 km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a complete stop in 4.5 s. If the car skids in a straight line for the entire length of the stopping distance, how long are its skid marks? Select one: a. 2.1 x 10^2 m b. 1.4 x10^2 m c. 7.0 x 10^1 m d. 2.5 x 10^2 m

c. 7.0 x 10^1 m

Moustapha Jones drives east at 100km/hr for 3 hours then back west at 80km/hr for 1.5 hours. Which pair of answers gives his average speed and average velocity? Select one: a. 93.3 km/hr, 40km/hr west b. 40km/hr, 93.3km/hr east c. 93.3km/hr, 40km/hr east d. 90km/hr, 40km/hr east

c. 93.3km/hr, 40km/hr east

At time t = 0, Car X traveling with speed v0 passes Car Y. which is just starting to move. Both cars then travel on two parallel lanes of the same straight road. The graphs of speed v versus time t for both cars are shown above. From time t = 0 to time t = 40 seconds, the areas under both curves are equal. Therefore, which of the following is true at time t = 40 seconds? Select one: a. Both cars have the same acceleration. b. Car Y is in front of car X. c. Car Y is passing car X. d. Car X is accelerating faster than car Y. e. Car Y is behind car X.

c. Car Y is passing car X.

Which of the following is not an example of projectile motion? Select one: a. a baseball hit by a bat b. a volleyball served over a net c. a hot-air balloon drifting toward Earth d. a long jumper in action

c. a hot-air balloon drifting toward Earth

If you know the acceleration of a car, its initial velocity, and the time interval, which of the following can you predict? Select one: a. the direction of the car's final velocity b. the displacement of the car c. all of the above d. the magnitude of the car's final velocity

c. all of the above

A pilot drops a bomb from a plane flying horizontally at a constant speed. Neglecting air resistance, when the bomb hits the ground the horizontal location of the plane will Select one: a. be behind the bomb. b. depend on the speed of the plane when the bomb was released. c. be over the bomb. d. be in front of the bomb.

c. be over the bomb.

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its vertical component of velocity Select one: a. remains unchanged. b. depends upon its mass c. decreases. d. increases.

c. decreases.

he diagram below shows the trajectories of two balls. The magnitude of the initial velocity is vi, the launch angle is q, and the horizontal and vertical components of the initial velocity are vxi and vyi. Compare the values of qi. The value for ball A Select one: a. is greater than the value for ball B. b. cannot be compared with the value for ball B using only the information given. c. is equal to the value for ball B. d. is less than the value for ball B.

c. is equal to the value for ball B.

A rock is thrown upward at 50 degrees with respect to the horizontal. As it rises, neglecting air drag, its horizontal component of velocity Select one: a. increases. b. decreases. c. remains unchanged. d. depends upon its mass

c. remains unchanged.

The graph above describes the motion of a cyclist. During the interval shown, the cyclist is Select one: a. slowing down. b. traveling at the same speed. c. speeding up. d. at rest.

c. speeding up.

A hunter on level ground fires a bullet at an angle of 2 degrees below the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first? Select one: a. the dropped one b. depends upon the caliber of the bullet c. the fired one d. Both hit at the same time.

c. the fired one

In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true? Select one: a. Dx = +3 m b. xf = +3 m c. xi = +3 m d. vavg = 3 m/s

c. xi = +3 m

Moustapha Jones reaches the bottom of a hill on his bike moving at a speed of 8.6 m/s when his chain breaks. He coasts up the hill until he comes to a stop after 3.5 s. Find his acceleration while on the hill, and the distance he travelled up the hill. Select one: a. 2.46m/s2, 15.1m b. -2.46m/s2, 45.2m c. 2.46m/s2, 45.2m d. -2.46m/s2, 15.1m

d. -2.46m/s2, 15.1m

A ball is thrown up from street level and returns to its original height as shown in the graph below. How fast is the ball moving after 3s?. Select one: a. 30 m/s b. -30 m/s c. -9.8 m/s d. 0 m/s

d. 0 m/s

A bullet fired horizontally over level ground hits the ground in 0.5 second. If it had been fired with twice the speed in the same direction, it would have hit the ground in Select one: a. depends upon the caliber of the bullet b. more than 0.5 s. c. less than 0.5 s. d. 0.5 s.

d. 0.5 s.

A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. Two seconds later it drops a second package. How far apart will the two packages land on the ground? Select one: a. 283 m b. 162 m c. 177 m d. 100 m

d. 100 m

A ball is thrown up from street level and returns to its original height as shown in the graph below. Use the graph to find the initial velocity of the ball a. 3 m/s b. -9.8 m/s c. -30 m/s d. 30 m/s

d. 30 m/s

A soccer ball is kicked into the air with an initial vertical velocity of +49 meters per second and a horizontal velocity of +19.6 meters per second. The diagram representing the vertical and horizontal velocity of the ball after 2 seconds of flight is: Select one: a. A b. C c. D d. B

d. B

The figure above shows the path of a ball tossed from a building. Air resistance is ignored. At what point of the ball's path shown in the figure above is the vertical component of the ball's velocity zero? Select one: a. A b. D c. C d. B

d. B

Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going up. Select one: a. Its velocity points upward and its acceleration points downward. b. Both its velocity and its acceleration point upward. c. Its velocity points downward and its acceleration points upward. d. Both its velocity and its acceleration points downward.

d. Both its velocity and its acceleration points downward.

The graph above describes the motion of a ball. At what point does the ball have an instantaneous velocity of zero? Select one: a. A b. D c. B d. C

d. C

When a football in a field goal attempt reaches its maximum height, how does its speed compare to its initial speed? Select one: a. It is equal to its initial speed. b. It is zero. c. It is greater than its initial speed. d. It is less than its initial speed

d. It is less than its initial speed

When an object is released from rest and falls in the absence of friction, which of the following is true concerning its motion? Select one: a. Both its acceleration and its velocity are constant. b. Its velocity is constant. c. Neither its acceleration nor its velocity is constant. d. Its acceleration is constant.

d. Its acceleration is constant.

Suppose a ball is thrown straight up. Make a statement about the velocity and the acceleration when the ball reaches the highest point. Select one: a. Its velocity is not zero and its acceleration is zero. b. Both its velocity and its acceleration are zero. c. Neither its velocity nor its acceleration is zero. d. Its velocity is zero and its acceleration is not zero.

d. Its velocity is zero and its acceleration is not zero.

A soldier throws a grenade horizontally from the top of a cliff. Which of the following curves best describes the path taken by the grenade? Select one: a. Hyperbola b. Circle c. Ellipse d. Parabola

d. Parabola

When a car's velocity is negative and its acceleration is negative, what is happening to the car's motion? Select one: a. The car travels at constant speed. b. The car remains at rest. c. The car slows down. d. The car speeds up.

d. The car speeds up.

A brick is dropped from the top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks. Select one: a. The second brick accelerates faster. b. The first brick accelerates faster. c. It is impossible to determine from the information given. d. The two bricks accelerate at the same rate.

d. The two bricks accelerate at the same rate.

Which of the following does not exhibit parabolic motion? Select one: a. a baseball thrown to home plate b. a frog jumping from land into water c. a basketball thrown to a hoop d. a flat piece of paper released from a window

d. a flat piece of paper released from a window

What is the path of a projectile (in the absence of friction)? Select one: a. a wavy line b. Projectiles do not follow a predictable path. c. a hyperbola d. a parabola

d. a parabola

Which of the following is an example of projectile motion? Select one: a. an aluminum can dropped straight down into the recycling bin b. a space shuttle being launched c. a jet lifting off a runway d. a thrown baseball

d. a thrown baseball

The figure above shows the path of a ball tossed from a building. Air resistance is ignored. In the figure above, the horizontal component of the ball's velocity at A is Select one: a. equal to the vertical component of the ball's velocity at C. b. equal in magnitude but opposite in direction to the horizontal component of the ball's velocity at D. c. zero. d. equal to the horizontal component of its initial velocity

d. equal to the horizontal component of its initial velocity

Acceleration due to gravity is also called Select one: a. instantaneous acceleration. b. negative velocity. c. displacement. d. free-fall acceleration.

d. free-fall acceleration

The diagram below shows the trajectories of two balls. The magnitude of the initial velocity is vi, the launch angle is q, and the horizontal and vertical components of the initial velocity are vxi and vyi. Compare the values of vxi. The value for ball A Select one: a. cannot be compared with the value for ball B using only the information given. b. is equal to the value for ball B. c. is less than the value for ball B. d. is greater than the value for ball B.

d. is greater than the value for ball B.

Which of the following units is the SI unit of velocity? Select one: a. second per meter b. meter x second c. meter d. meter per second

d. meter per second

In the graph above, what is the correct description of any location to the left of the zero? Select one: a. negative displacement b. negative change of displacement c. negative distance d. negative position

d. negative position

A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits the level ground below? Select one: a. Neither, since both are traveling at the same speed. b. It is impossible to tell from the information given. c. the ball d. the stone

d. the stone

An object is released from rest on a planet that has no atmosphere. The object falls freely for 3.0 meters in the first second. What is the magnitude of the acceleration due to gravity on the planet? Select one: a. l .5 m/s2 b. 12.0 m/s2 c. 10.0 m/s2 d. 3.0 m/s2 e. 6.0 m/s2

e. 6.0 m/s2

At time t = 0, Car X traveling with speed v0 passes Car Y. which is just starting to move. Both cars then travel on two parallel lanes of the same straight road. The graphs of speed v versus time t for both cars are shown above. Which of the following is true at time t = 20 seconds? Select one: a. Both cars have the same acceleration. b. Car Y is passing car X. c. Car Y is in front of car X. d. Car X is accelerating fester then car Y. e. Car Y is behind car X.

e. Car Y is behind car X.

The displacement x of an object moving along the x-axis is shown above as a function of time t. The acceleration of this object must be Select one: a. constant but not zero b. increasing c. decreasing d. equal to g e. zero

e. zero

A ball is dropped from the top of a building. In the absence of air resistance which of the following could be a velocity time graph for the falling ball?

graph starting at 0 ad ending at -60

The driver of a car traveling at 110 km/h slams on the brakes so that the car undergoes a constant acceleration, skidding to a complete stop in 4.5 s. Which is the most accurate plot of velocity versus time for the braking car?

graph starting at 30 with diagnol negative slope

A ball is tossed straight up and then falls to the same height from which it was released. Which graph below properly shows how the velocity of the ball changes with time from the moment of release to the moment before impact?

graph with diagnol line

A ball is thrown up from street level and returns to its original height. Which of the following could be a velocity-time graph of the ball's trip?

graph with line starting at 30 with downward slope

A man starts his car from rest and accelerates at 1 m/s2 for 4 seconds. He then continues at a constant velocity for 10 seconds until he sees a tree blocking the road and applies brakes. The car, decelerating at 1 m/s2, finally comes to rest. Which of the following graphs represents the motion correctly?

line up to 4 from 0 and then a constant line and then line back down to 0