Physics A Conceptual World View 7th Edition by Larry D. Kirkpatrick Test Bank

 

 

To Purchase this Complete Test Bank with Answers Click the link Below

 

https://tbzuiqe.com/product/physics-a-conceptual-world-view-7th-edition-by-larry-d-kirkpatrick-test-bank/

 

If face any problem or Further information contact us At tbzuiqe@gmail.com

 

 

Sample Questions

 

 

Chapter 4–Motions in Space

Student: ___________________________________________________________________________

1.    If a race car is traveling around a circular track at a constant speed of 100 mph, we know that the car experiences
A. no net force.
B. a centripetal force.
C. a centrifugal force.
D. a net force in the forward direction.

 

2.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the velocity vector point?
A. ­
B. ¯
C. ®
D. Ø

 

3.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the net force point?
A. ­
B. ¯
C. ®
D. Ø

 

4.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the acceleration point?
A. ­
B. ¯
C. ®
D. Ø

 

5.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. Imagine that the car hits a large oil slick that reduces the force of friction to zero. In what direction will the car slide?
A. ­
B. ¯
C. ®
D. Ø

 

6.    A bug rides on a phonograph record. In which direction does the acceleration of the bug point?
A. tangent to the circular path
B. toward the center of the record
C. away from the center of the record
D. up

 

7.    A bug rides on a phonograph record. In which direction does the change in velocity of the bug point?
A. tangent to the circular path
B. toward the center of the record
C. away from the center of the record
D. up

 

8.    Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point?
A. tangent to the circular path
B. toward the center
C. away from the center
D. down

 

9.    In straight line motion the
A. acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

10.  In uniform circular motion the
A. acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

11.  What is the change in velocity if a car traveling 30 m/s north slows to 20 m/s north?
A. 20 m/s north
B. 10 m/s north
C. 10 m/s south
D. 30 m/s south

 

12.  What is the change in velocity if a car traveling 30 m/s north changes to 20 m/s south?
A. 10 m/s north
B. 20 m/s south
C. 30 m/s north
D. 50 m/s south

 

13.  An airplane is flying south at 40 m/s. What is the magnitude of the airplane’s change in velocity if it is later flying west at 30 m/s?
A. 10 m/s
B. 30 m/s
C. 40 m/s
D. 50 m/s

 

14.  A car is traveling south at 30 m/s. Later it is observed traveling west at 30 m/s. What is the car’s change in velocity?
A. 42 m/s north
B. 42 m/s west
C. 42 m/s southwest
D. 42 m/s northwest

 

15.  A migrating bird is initially flying south at 8 m/s. To avoid hitting a high-rise building, the bird veers and changes its velocity to 6 m/s east over a period of 2 s. What is the magnitude of the bird’s average acceleration during this 2-s interval?
A. 5 m/s²
B. 7 m/s²
C. 10 m/s²
D. 14 m/s²

 

16.  A bunny is initially hopping east at 8 m/s when it first sees a fox. Over the next half second, the bunny changes its velocity to west at 12 m/s and escapes. What was the magnitude of the bunny’s average acceleration during this half-second interval?
A. 4 m/s²
B. 8 m/s²
C. 20 m/s²
D. 40 m/s²

 

17.  By what factor does the centripetal acceleration change if a car goes around a corner twice as fast?
A. 0.5
B. It stays the same.
C. 2
D. 4

 

18.  What centripetal acceleration is required to follow a circular path with a radius of 50 m at a speed of 20 m/s?
A. 2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 8 m/s²

 

19.  A 60-kg person on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of 3 m/s. What is the magnitude of the acceleration experienced by this person?
A. 1 m/s²
B. 3 m/s²
C. 10 m/s²
D. 180 m/s²

 

20.  A 60-kg person on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of 3 m/s. What is the magnitude of the net force experienced by this person?
A. zero
B. 60 N
C. 180 N
D. 540 N

 

21.  A cyclist turns a corner with a radius of 50 m at a speed of 20 m/s. What is the magnitude of the cyclist’s acceleration?
A. 0.4 m/s²
B. 2.5 m/s²
C. 8 m/s²
D. 10 m/s²

 

22.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which bullet will hit the ground first?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

23.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which bullet will hit the ground with the greater velocity?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

24.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which would hit the ground first if this experiment were conducted on the surface of the Moon?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

25.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. If the bullets were not identical, but rather the dropped bullet had twice the mass of the other, which bullet would hit the ground first?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

26.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s instantaneous velocity when it is located at point B?
A. Arrow 1
B. Arrow 4
C. Arrow 5
D. Arrow 6
E. The velocity is zero

 

27.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s acceleration when it is located at point C?
A. Arrow 2
B. Arrow 4
C. Arrow 6
D. Arrow 8
E. The acceleration is zero

 

28.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s acceleration when it is located at point D?
A. Arrow 1
B. Arrow 3
C. Arrow 5
D. Arrow 7
E. The acceleration is zero

 

29.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s change in velocity vector for a small time interval containing point A?
A. Arrow 2
B. Arrow 4
C. Arrow 6
D. Arrow 8
E. The change in velocity is zero

 

30.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.The magnitude of the car’s acceleration at point C is
A. greater than that at point B
B. less than that at point B
C. equal to that at point B (but not zero)
D. the acceleration is zero at both points

 

31.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Which arrow best represents the direction of the net force exerted on the car when it is located at point B?
A. Arrow 1
B. Arrow 3
C. Arrow 5
D. Arrow 7
E. The net force is zero

 

32.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. The magnitude of the net force exerted on the car at point D is
A. greater than that at point A
B. less than that at point A
C. equal to that at point A (but not zero)
D. the net force is zero at both points

 

33.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Suppose the car hit a patch of oil at point C and lost all friction with the road.  Which arrow best represents the direction in which the car would move?
A. Arrow 5
B. Arrow 6
C. Arrow 7
D. Arrow 8

 

34.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Which force is responsible for keeping the car on the track at point C?
A. a forward friction force on the tires by the road
B. a force on the car by the engine
C. a backward friction force on the tires by the road
D. a sideways friction force on the tires by the road

 

35.  A 2-kg ball is thrown horizontally at a speed of 10 m/s. At the same time a 1-kg ball is dropped from the same height. Ignoring air resistance, which ball hits the ground first?
A. the 1-kg ball
B. the 2-kg ball
C. It’s a tie.

 

36.  A red ball is thrown straight down from the edge of a tall cliff with a speed of 30 m/s. At the same time a green ball is thrown straight up with the same speed. How many seconds later than the red ball will the green ball land?
A. 3 s
B. 6 s
C. 10 s
D. There is not enough information to say.

 

37.  A red ball is thrown straight down from the edge of a tall cliff with a speed of 30 m/s. At the same time a green ball is thrown straight up with the same speed. Which ball (if either) will be traveling faster when it reaches the ground below?
A. the red ball
B. the green ball
C. Both balls will have the same speed.

 

38.  Which of the following statements about projectile motion is true?
A. The horizontal and vertical motions are independent.
B. The force on the projectile is constant throughout the flight.
C. The acceleration of the projectile is constant throughout the flight.
D. All of the above statements are true.

 

39.  In projectile motion the
A. acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

40.  A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball’s velocity?
A. up
B. down
C. horizontal
D. The velocity is zero.

 

41.  A football quarterback throws a long pass toward the end zone. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the net force on the ball?
A. up
B. down
C. horizontal
D. The net force is zero.

 

42.  A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball’s acceleration?
A. up
B. down
C. horizontal
D. The acceleration is zero.

 

43.  A football quarterback throws a long pass toward the end zone. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the acceleration of the ball?
A. zero
B. 10 m/s² downward
C. 10 m/s² upward

 

44.  A physics student reports that upon arrival on planet X, he promptly sets up the “monkey-shoot” demonstration. If the gravity on planet X is twice what it is on Earth, he should obtain a
A. miss because the monkey’s weight is twice as big on planet X.
B. hit only if the ball’s horizontal velocity is increased.
C. miss because the monkey’s mass is unchanged.
D. hit because the ball and the monkey fall vertically with the same acceleration.

 

45.  A baseball is hit with a horizontal speed of 22 m/s and a vertical speed of 14 m/s upward. What are these speeds 1 s later?
A. 22 m/s horizontal and 4 m/s upward
B. 22 m/s horizontal and 24 m/s upward
C. 12 m/s horizontal and 4 m/s upward
D. 12 m/s horizontal and 14 m/s upward

 

46.  After being hit, a baseball has a horizontal speed of 20 m/s and a vertical speed of 25 m/s upward. Ignoring air resistance what are these speeds 1 s later?
A. 20 m/s horizontal and 25 m/s vertical
B. 20 m/s horizontal and 15 m/s vertical
C. 10 m/s horizontal and 25 m/s vertical
D. 20 m/s horizontal and 35 m/s vertical

 

47.  A rock is thrown off a tall cliff with a vertical speed of 25 m/s upward and a horizontal speed of 30 m/s. What will these speeds be 3 s later?
A. 25 m/s upward and 30 m/s horizontal
B. 5 m/s downward and 30 m/s horizontal
C. 25 m/s upward and 0 m/s horizontal
D. 30 m/s downward and 60 m/s horizontal

 

48.  An ashtray slides across a table with a speed of 0.9 m/s and falls off the edge. If it takes 0.4 s to reach the floor, how far from the edge of the table does the ashtray land?
A. 0.36 m
B. 0.4 m
C. 0.9 m
D. 1.3 m

 

49.  A car drives off a vertical cliff at a speed of 24 m/s. If it takes 3 s for the car to hit the ground, how far from the base of the cliff does it land?
A. 3 m
B. 8 m
C. 24 m
D. 72 m

 

50.  A rock is thrown off a tall cliff with a vertical speed of 25 m/s upward and a horizontal speed of 30 m/s. If the rock lands 8 s later, how far from the base of the cliff will it land?
A. 30 m
B. 120 m
C. 165 m
D. 240 m

 

51.  A bowling ball rolls off the edge of a giant’s table at 15 m/s. If it takes 4 s for the ball to hit the ground, how far does it land from the base of the table?
A. 10 m
B. 15 m
C. 40 m
D. 60 m

 

52.  A bowling ball rolls off the edge of a giant’s table at 15 m/s. If it takes 4 s for the ball to hit the ground, what is the height of the table?
A. 40 m
B. 60 m
C. 80 m
D. 160 m

 

53.  Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Ignoring air resistance, it would take 14 s for the water to fall from the lip of the falls to the river below. If the water lands 50 m from the base of the vertical cliff, what was its horizontal speed at the top?
A. 3.6 m/s
B. 9.8 m/s
C. 50 m/s
D. 700 m/s

 

54.  A baseball is hit with a vertical speed of 10 m/s and a horizontal speed of 30 m/s. How long will the ball remain in the air?
A. 1 s
B. 2 s
C. 3 s
D. 6 s

 

55.  A tennis ball is hit with a vertical speed of 10 m/s and a horizontal speed of 30 m/s. How far will the ball travel horizontally before landing?
A. 30 m
B. 40 m
C. 60 m
D. 80 m

 

56.  Exhibit 4-4

Each case in the figure below depicts an object’s velocity vector and acceleration vector at an instant in time.

Refer to Exhibit 4-4.  In Case 1, the object is
A. speeding up.
B. slowing down.
C. moving with constant speed.

 

57.  Exhibit 4-4

Each case in the figure below depicts an object’s velocity vector and acceleration vector at an instant in time.

Refer to Exhibit 4-4.  In which case is the speed of the object changing?
A. 1 only
B. 2 only
C. 3 only
D. 1 and 2
E. 1 and 3
F. 1, 2, and 3

 

58.  Exhibit 4-4

Each case in the figure below depicts an object’s velocity vector and acceleration vector at an instant in time.

Refer to Exhibit 4-4.  In Case 3, the object is
A. turning to the right
B. moving in a straight line
C. turning to the left

 

59.  Exhibit 4-4

Each case in the figure below depicts an object’s velocity vector and acceleration vector at an instant in time.

Refer to Exhibit 4-4.  In which case is the object moving with constant speed along a circular path?
A. 1 only
B. 2 only
C. 3 only
D. 1 and 3
E. all of these
F. none of these

 

60.  Exhibit 4-4

Each case in the figure below depicts an object’s velocity vector and acceleration vector at an instant in time.

Refer to Exhibit 4-4.  In which cases is the object moving along a straight-line path?
A. 1 only
B. 2 only
C. 3 only
D. The object is moving along a straight-line path in all of these cases.
E. The object is not moving along a straight-line path in any of these cases.

 

 

 

Chapter 4–Motions in Space Key

1.    If a race car is traveling around a circular track at a constant speed of 100 mph, we know that the car experiences
A.no net force.
B. a centripetal force.
C. a centrifugal force.
D. a net force in the forward direction.

 

2.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the velocity vector point?
A. ­
B. ¯
C. ®
D. Ø

 

3.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the net force point?
A. ­
B. ¯
C. ®
D. Ø

 

4.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. In what direction does the acceleration point?
A. ­
B. ¯
C. ®
D. Ø

 

5.    Exhibit 4-1

A racecar is moving counterclockwise on a circular path as shown in the diagram. Imagine that at this instant, the car is at point P and moving at a speed of 100 mph.

Refer to Exhibit 4-1. Imagine that the car hits a large oil slick that reduces the force of friction to zero. In what direction will the car slide?
A. ­
B. ¯
C. ®
D. Ø

 

6.    A bug rides on a phonograph record. In which direction does the acceleration of the bug point?
A.tangent to the circular path
B. toward the center of the record
C. away from the center of the record
D. up

 

7.    A bug rides on a phonograph record. In which direction does the change in velocity of the bug point?
A.tangent to the circular path
B. toward the center of the record
C. away from the center of the record
D. up

 

8.    Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point?
A.tangent to the circular path
B. toward the center
C. away from the center
D. down

 

9.    In straight line motion the
A.acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

10.  In uniform circular motion the
A.acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

11.  What is the change in velocity if a car traveling 30 m/s north slows to 20 m/s north?
A.20 m/s north
B. 10 m/s north
C. 10 m/s south
D. 30 m/s south

 

12.  What is the change in velocity if a car traveling 30 m/s north changes to 20 m/s south?
A.10 m/s north
B. 20 m/s south
C. 30 m/s north
D. 50 m/s south

 

13.  An airplane is flying south at 40 m/s. What is the magnitude of the airplane’s change in velocity if it is later flying west at 30 m/s?
A.10 m/s
B. 30 m/s
C. 40 m/s
D. 50 m/s

 

14.  A car is traveling south at 30 m/s. Later it is observed traveling west at 30 m/s. What is the car’s change in velocity?
A.42 m/s north
B. 42 m/s west
C. 42 m/s southwest
D. 42 m/s northwest

 

15.  A migrating bird is initially flying south at 8 m/s. To avoid hitting a high-rise building, the bird veers and changes its velocity to 6 m/s east over a period of 2 s. What is the magnitude of the bird’s average acceleration during this 2-s interval?
A.5 m/s²
B. 7 m/s²
C. 10 m/s²
D. 14 m/s²

 

16.  A bunny is initially hopping east at 8 m/s when it first sees a fox. Over the next half second, the bunny changes its velocity to west at 12 m/s and escapes. What was the magnitude of the bunny’s average acceleration during this half-second interval?
A.4 m/s²
B. 8 m/s²
C. 20 m/s²
D. 40 m/s²

 

17.  By what factor does the centripetal acceleration change if a car goes around a corner twice as fast?
A.0.5
B. It stays the same.
C. 2
D. 4

 

18.  What centripetal acceleration is required to follow a circular path with a radius of 50 m at a speed of 20 m/s?
A.2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 8 m/s²

 

19.  A 60-kg person on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of 3 m/s. What is the magnitude of the acceleration experienced by this person?
A.1 m/s²
B. 3 m/s²
C. 10 m/s²
D. 180 m/s²

 

20.  A 60-kg person on a merry-go-round is traveling in a circle with a radius of 3 m at a speed of 3 m/s. What is the magnitude of the net force experienced by this person?
A.zero
B. 60 N
C. 180 N
D. 540 N

 

21.  A cyclist turns a corner with a radius of 50 m at a speed of 20 m/s. What is the magnitude of the cyclist’s acceleration?
A.0.4 m/s²
B. 2.5 m/s²
C. 8 m/s²
D. 10 m/s²

 

22.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which bullet will hit the ground first?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

23.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which bullet will hit the ground with the greater velocity?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

24.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. Which would hit the ground first if this experiment were conducted on the surface of the Moon?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

25.  Exhibit 4-2

A gun is held horizontally and fired. At the same time the bullet leaves the gun’s barrel an identical bullet is dropped from the same height. Neglect air resistance.

Refer to Exhibit 4-2. If the bullets were not identical, but rather the dropped bullet had twice the mass of the other, which bullet would hit the ground first?
A. The bullet that was fired.
B. The bullet that was dropped.
C. It will be a tie.

 

26.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s instantaneous velocity when it is located at point B?
A. Arrow 1
B. Arrow 4
C. Arrow 5
D. Arrow 6
E. The velocity is zero

 

27.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s acceleration when it is located at point C?
A. Arrow 2
B. Arrow 4
C. Arrow 6
D. Arrow 8
E. The acceleration is zero

 

28.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s acceleration when it is located at point D?
A. Arrow 1
B. Arrow 3
C. Arrow 5
D. Arrow 7
E. The acceleration is zero

 

29.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.Which arrow  best represents the direction of the car’s change in velocity vector for a small time interval containing point A?
A. Arrow 2
B. Arrow 4
C. Arrow 6
D. Arrow 8
E. The change in velocity is zero

 

30.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3.The magnitude of the car’s acceleration at point C is
A. greater than that at point B
B. less than that at point B
C. equal to that at point B (but not zero)
D. the acceleration is zero at both points

 

31.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Which arrow best represents the direction of the net force exerted on the car when it is located at point B?
A. Arrow 1
B. Arrow 3
C. Arrow 5
D. Arrow 7
E. The net force is zero

 

32.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. The magnitude of the net force exerted on the car at point D is
A. greater than that at point A
B. less than that at point A
C. equal to that at point A (but not zero)
D. the net force is zero at both points

 

33.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Suppose the car hit a patch of oil at point C and lost all friction with the road.  Which arrow best represents the direction in which the car would move?
A. Arrow 5
B. Arrow 6
C. Arrow 7
D. Arrow 8

 

34.  Exhibit 4-3

A car moves with constant speed in the clockwise direction around the test track shown in the top view diagram below left.  Use the arrows shown below right to answer the following questions.

Refer to Exhibit 4-3. Which force is responsible for keeping the car on the track at point C?
A. a forward friction force on the tires by the road
B. a force on the car by the engine
C. a backward friction force on the tires by the road
D. a sideways friction force on the tires by the road

 

35.  A 2-kg ball is thrown horizontally at a speed of 10 m/s. At the same time a 1-kg ball is dropped from the same height. Ignoring air resistance, which ball hits the ground first?
A.the 1-kg ball
B. the 2-kg ball
C. It’s a tie.

 

36.  A red ball is thrown straight down from the edge of a tall cliff with a speed of 30 m/s. At the same time a green ball is thrown straight up with the same speed. How many seconds later than the red ball will the green ball land?
A.3 s
B. 6 s
C. 10 s
D. There is not enough information to say.

 

37.  A red ball is thrown straight down from the edge of a tall cliff with a speed of 30 m/s. At the same time a green ball is thrown straight up with the same speed. Which ball (if either) will be traveling faster when it reaches the ground below?
A.the red ball
B. the green ball
C. Both balls will have the same speed.

 

38.  Which of the following statements about projectile motion is true?
A.The horizontal and vertical motions are independent.
B. The force on the projectile is constant throughout the flight.
C. The acceleration of the projectile is constant throughout the flight.
D. All of the above statements are true.

 

39.  In projectile motion the
A.acceleration is parallel (or antiparallel) to the velocity.
B. acceleration is perpendicular to the velocity.
C. acceleration is vertical, while the velocity can be in any direction.
D. acceleration is vertical and the velocity is horizontal.

 

40.  A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball’s velocity?
A.up
B. down
C. horizontal
D. The velocity is zero.

 

41.  A football quarterback throws a long pass toward the end zone. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the net force on the ball?
A.up
B. down
C. horizontal
D. The net force is zero.

 

42.  A baseball player throws a ball from left field toward home plate. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the direction of the ball’s acceleration?
A.up
B. down
C. horizontal
D. The acceleration is zero.

 

43.  A football quarterback throws a long pass toward the end zone. Assume that you can neglect the effects of air resistance. At the instant the ball reaches its highest point, what is the acceleration of the ball?
A.zero
B. 10 m/s² downward
C. 10 m/s² upward

 

44.  A physics student reports that upon arrival on planet X, he promptly sets up the “monkey-shoot” demonstration. If the gravity on planet X is twice what it is on Earth, he should obtain a
A.miss because the monkey’s weight is twice as big on planet X.
B. hit only if the ball’s horizontal velocity is increased.
C. miss because the monkey’s mass is unchanged.
D. hit because the ball and the monkey fall vertically with the same acceleration.

 

45.  A baseball is hit with a horizontal speed of 22 m/s and a vertical speed of 14 m/s upward. What are these speeds 1 s later?
A.22 m/s horizontal and 4 m/s upward
B. 22 m/s horizontal and 24 m/s upward
C. 12 m/s horizontal and 4 m/s upward
D. 12 m/s horizontal and 14 m/s upward

 

46.  After being hit, a baseball has a horizontal speed of 20 m/s and a vertical speed of 25 m/s upward. Ignoring air resistance what are these speeds 1 s later?
A.20 m/s horizontal and 25 m/s vertical
B. 20 m/s horizontal and 15 m/s vertical
C. 10 m/s horizontal and 25 m/s vertical
D. 20 m/s horizontal and 35 m/s vertical