Question 1

The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time.  (a)At which moment in time is the speed of the object the greatest?
(b)At which moment in time is the speed of the object equal to zero?

Accepted Answer

The answer of The graph in the figure shows the...

Question 2

Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct?

Accepted Answer

A)  The acceleration is toward the east.
B)  Since the car is slowing down, its acceleration must be negative.
C)  The acceleration is zero.
D)  The acceleration is toward the west.E) All of the above
F) B) and D)

Question 3

An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?

Accepted Answer

A)  17 s
B)  0.058 s
C)  4.0 s
D)  0.25 sE) None of the above
F) A) and D)

Question 4

An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up? Neglect air resistance.

Accepted Answer

A)  0.52 s
B)  1.2 s
C)  2.4 s
D)  3.1 s
E)  4.2 sF) B) and C)
G) B) and D)

Question 5

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

Accepted Answer

A)  37.0 m/s
B)  93.0 m/s
C)  65.7 m/s
D)  4320 m/s
E)  186 m/sF) A) and B)
G) A) and C)

Question 6

Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its acceleration just before it reaches its highest point?

Accepted Answer

A)  zero
B)  slightly less than g
C)  exactly g
D)  slightly greater than gE) None of the above
F) All of the above

Question 7

A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

Accepted Answer

A)  20 m/s
B)  16 m/s
C)  12 m/s
D)  10 m/sE) A) and B)
F) B) and D)

Question 8

A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

Accepted Answer

A)  0.937
B)  1.07
C)  0.878
D)  1.14E) A) and B)
F) A) and C)

Question 9

The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times?
(a)At 1.0 s
(b)At 3.0 s

Accepted Answer

The answer of The figure shows a graph of the...

Question 10

The graph in the figure shows the position of a particle as a function of time as it travels along the x-axis.
(a)What is the magnitude of the average velocity of the particle between t = 1.0 s and t = 4.0 s?
(b)What is the average speed of the particle between t = 1.0 s and t = 4.0 s?

Accepted Answer

(a)0.67 m/...

Question 11

A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

Accepted Answer

A)  160 m
B)  330 m
C)  320 m
D)  410 m
E)  490 mF) A) and D)
G) A) and C)

Question 12

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?

Accepted Answer

A)  9.8 m/s upward
B)  9.8 m/s downward
C)  0 m/s
D)  19.6 m/s downwardE) B) and D)
F) A) and B)

Question 13

If the acceleration of an object is zero, then that object cannot be moving.

Accepted Answer

A) True 
 B)False

Question 14

Suppose that an object travels from one point in space to another. Make a comparison between the magnitude of the displacement and the distance traveled by this object.

Accepted Answer

A)  The displacement is either greater than or equal to the distance traveled.
B)  The displacement is always equal to the distance traveled.
C)  The displacement is either less than or equal to the distance traveled.
D)  The displacement can be either greater than, smaller than, or equal to the distance traveled.E) A) and B)
F) None of the above

Question 15

The motion of a particle is described in the velocity vs. time graph shown in the figure.  Over the nine-second interval shown, we can say that the speed of the particle

Accepted Answer

A)  only increases.
B)  only decreases.
C)  increases and then decreases.
D)  decreases and then increases.
E)  remains constant.F) D) and E)
G) A) and E)

Question 16

A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

Accepted Answer

A)  Both its velocity and its acceleration point upward.
B)  Its velocity points upward and its acceleration points downward.
C)  Its velocity points downward and its acceleration points upward.
D)  Both its velocity and its acceleration points downward.E) None of the above
F) B) and C)

Question 17

The slope of a velocity versus time graph gives

Accepted Answer

A)  the distance traveled.
B)  velocity.
C)  acceleration.
D)  displacement.E) A) and B)
F) A) and C)

Question 18

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Accepted Answer

A)  8.0 s
B)  11 s
C)  14 s
D)  16 sE) B) and D)
F) None of the above

Question 19

An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip?

Accepted Answer

A)  260 mi/h
B)  270 mi/h
C)  275 mi/h
D)  280 mi/hE) A) and D)
F) B) and C)

Question 20

If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?

Accepted Answer

Exam 2: Motion in One Dimension

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Correct AnswerverifiedShow Answer

An airplane starts from rest and accelerates at a constant 10.8 m/s2. What is its speed at the end of a 400 m-long runway?

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If a car accelerates at a uniform 4.0 m/s2, how long will it take to reach a speed of 80 km/hr, starting from rest?

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A certain test car can go from rest to 32.0 m/s in 3.88 s. The same car can come to a full stop from that speed in 4.14 s. What is the ratio of the magnitude of the starting acceleration to the stopping acceleration?

Correct AnswerverifiedShow Answer

If the acceleration of an object is zero, then that object cannot be moving.

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An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip?

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A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s2 for 4.0 s. What is the final speed of the car?

Correct AnswerverifiedShow Answer

Suppose that an object travels from one point in space to another. Make a comparison between the magnitude of the displacement and the distance traveled by this object.

Correct AnswerverifiedShow Answer

The motion of a particle is described in the velocity vs. time graph shown in the figure. Over the nine-second interval shown, we can say that the speed of the particle

Correct AnswerverifiedShow Answer

An airplane increases its speed at the average rate of 15 m/s2. How much time does it take to increase its speed from 100 m/s to 160 m/s?

Correct AnswerverifiedShow Answer

The figure shows a graph of the velocity of an object as a function of time. What is the acceleration of the object at the following times? (a)At 1.0 s (b)At 3.0 s

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An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up? Neglect air resistance.

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Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which of the following statements about its acceleration is correct?

Correct AnswerverifiedShow Answer

A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3.0 s, assuming negligible air resistance?

Correct AnswerverifiedShow Answer

The slope of a velocity versus time graph gives

Correct AnswerverifiedShow Answer

The graph in the figure shows the position of a particle as a function of time as it travels along the x-axis. (a)What is the magnitude of the average velocity of the particle between t = 1.0 s and t = 4.0 s? (b)What is the average speed of the particle between t = 1.0 s and t = 4.0 s?

Correct Answerverified(a)0.67 m/...View AnswerShow Answer

Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its acceleration just before it reaches its highest point?

Correct AnswerverifiedShow Answer

The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time. (a)At which moment in time is the speed of the object the greatest? (b)At which moment in time is the speed of the object equal to zero?

Correct AnswerverifiedShow Answer

A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s2. After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

Correct AnswerverifiedShow Answer

A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?

Correct AnswerverifiedShow Answer

A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s² and there is no atmosphere. How long does it take for the laser to reach the maximum height?

Correct Answer
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An airplane starts from rest and accelerates at a constant 10.8 m/s². What is its speed at the end of a 400 m-long runway?

Correct Answer
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If a car accelerates at a uniform 4.0 m/s², how long will it take to reach a speed of 80 km/hr, starting from rest?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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A cart starts from rest and accelerates uniformly at 4.0 m/s² for 5.0 s. It next maintains the velocity it has reached for 10 s. Then it slows down at a steady rate of 2.0 m/s² for 4.0 s. What is the final speed of the car?

Correct Answer
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Correct Answer
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Correct Answer
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An airplane increases its speed at the average rate of 15 m/s². How much time does it take to increase its speed from 100 m/s to 160 m/s?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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(a)0.67 m/...
View Answer

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Correct Answer
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A test rocket at ground level is fired straight up from rest with a net upward acceleration of 20 m/s². After 4.0 s, the motor turns off but the rocket continues to coast upward with insignificant air resistance. What maximum elevation does the rocket reach?

Correct Answer
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Correct Answer
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