Question 1

The graph in the figure shows the velocity of a particle as it travels along the x-axis.What is the magnitude of the average acceleration of the particle between t = 1.0 s and t = 4.0 s? 2 B) 1.7 m/s2 C) 2.0 m/s2 D) 2.5 m/s2 E) 3.0 m/s2" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0.33 m/s2
B)  1.7 m/s2
C)  2.0 m/s2
D)  2.5 m/s2
E)  3.0 m/s2F) B) and C)
G) All of the above

Question 2

The graph in the figure shows the position of a particle as it travels along the x-axis. 
At what value of t is the speed of the particle equal to 0 m/s?

Accepted Answer

A)  0 s
B)  1 s
C)  2 s
D)  3 s
E)  4 sF) A) and B)
G) None of the above

Question 3

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light.Which statement concerning its acceleration must be correct?

Accepted Answer

A)  Its acceleration is positive.
B)  Its acceleration is negative.
C)  Its acceleration is zero.
D)  Its acceleration is decreasing in magnitude as the car slows down.E) C) and D)
F) A) and C)

Question 4

A racing car accelerates uniformly from rest along a straight track.This track has markers spaced at equal distances along it from the start,as shown in the figure.The car reaches a speed of 140 km/h as it passes marker 2. 
Where on the track was the car when it was traveling at half this speed,that is at 70 km/h?

Accepted Answer

A)  before marker 1
B)  at marker 1
C)  between marker 1 and marker 2D) All of the above
E) B) and C)

Question 5

Two athletes jump straight up.John has twice the initial speed of Harry.Compared to Harry,John stays in the air

Accepted Answer

A)  0.50 times as long as Harry.
B)  the same time as Harry.
C)  twice as long as Harry.
D)  three times as long as Harry.
E)  four times as long as Harry.F) All of the above
G) B) and E)

Question 6

A motorist makes a trip of 180 miles.For the first 90 miles she drives at a constant speed of 30 mph.At what constant speed must she drive the remaining distance if her average speed for the total trip is to be 40 mph?

Accepted Answer

A)  45 mph
B)  50 mph
C)  52.5 mph
D)  55 mph
E)  60 mphF) A) and C)
G) D) and E)

Question 7

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m.She completes one lap in 100 seconds.What is her average velocity?

Accepted Answer

A)  2.5 m/s
B)  5.0 m/s
C)  10 m/s
D)  0 m/s
E)  1.3 m/sF) All of the above
G) A) and E)

Question 8

An object starts from rest and undergoes uniform acceleration.During the first second it travels 5.0 m.How far will it travel during the third second?

Accepted Answer

A)  5.0 m
B)  15 m
C)  25 m
D)  45 mE) A) and B)
F) A) and C)

Question 9

Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at as it passed the top of the flagpole? Neglect air resistance.

Accepted Answer

A)  6.4 m/s
B)  16 m/s
C)  18 m/s
D)  29 m/s
E)  33 m/sF) None of the above
G) C) and D)

Question 10

If the velocity of an object is zero at one instant,what is true about the acceleration of that object? (There could be more than one correct choice. )

Accepted Answer

A)  The acceleration could be positive.
B)  The acceleration could be negative.
C)  The acceleration could be zero.
D)  The acceleration must be zero.E) B) and D)
F) None of the above

Question 11

Two cars are traveling at the same speed and hit the brakes at the same time.Car A decelerates (decreases its velocity)  at twice the rate of car B.If car B takes time T to stop,how long does it take car A to stop?

Accepted Answer

A)  4T
B)  2T
C)  T
D)  T /2
E)  T/4F) All of the above
G) C) and E)

Question 12

If the velocity of an object is zero at some point,then its acceleration must also be zero at that point.

Accepted Answer

A) True 
 B)False

Question 13

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) A) and D)
F) All of the above

Question 14

A ball is thrown straight upward from ground level with a speed of 18 m/s. How much time passes before the ball strikes the ground if we disregard air resistance?

Accepted Answer

A)  3.7 s
B)  1.8 s
C)  1.1 s
D)  0.6 sE) All of the above
F) B) and C)

Question 15

A ball is thrown downward in the absence of air resistance.After it has been released,which statement(s) concerning its acceleration is correct? (There could be more than one correct choice. )

Accepted Answer

A)  Its acceleration is constantly increasing.
B)  Its acceleration is constant.
C)  Its acceleration is constantly decreasing.
D)  Its acceleration is zero.
E)  Its acceleration is greater than g.F) A) and B)
G) None of the above

Question 16

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) A) and B)
F) A) and C)

Question 17

An object is moving in a straight line with constant acceleration.Initially it is traveling at 16 m/s.Three seconds later it is traveling at 10 m/s.How far does it move during this time?

Accepted Answer

A)  30 m
B)  39 m
C)  48 m
D)  57 mE) B) and D)
F) A) and D)

Question 18

The figure shows a graph of the velocity of an object as a function of time.What is the displacement of the object from 0 s to 6.0 s?

Accepted Answer

A)  20 m
B)  40 m
C)  60 m
D)  80 m
E)  100 mF) A) and D)
G) C) and D)

Question 19

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

Accepted Answer

A)  h/4
B)  h/2
C)  h
D)  2h
E)  4hF) A) and E)
G) A) and C)

Question 20

The area under a curve in a velocity versus time graph gives

Accepted Answer

A)  acceleration.
B)  velocity.
C)  displacement.
D)  position.E) A) and D)
F) B) and C)

Exam 2: One-Dimensional Kinematics

The area under a curve in a velocity versus time graph gives

Correct Answer
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Two cars are traveling at the same speed and hit the brakes at the same time.Car A decelerates (decreases its velocity) at twice the rate of car B.If car B takes time T to stop,how long does it take car A to stop?

Correct Answer
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If the velocity of an object is zero at one instant,what is true about the acceleration of that object? (There could be more than one correct choice. )

Correct Answer
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A ball is thrown straight upward from ground level with a speed of 18 m/s. How much time passes before the ball strikes the ground if we disregard air resistance?

Correct Answer
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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 Answer
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Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light.Which statement concerning its acceleration must be correct?

Correct Answer
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An object starts from rest and undergoes uniform acceleration.During the first second it travels 5.0 m.How far will it travel during the third second?

Correct Answer
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A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m.She completes one lap in 100 seconds.What is her average velocity?

Correct Answer
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Two athletes jump straight up.John has twice the initial speed of Harry.Compared to Harry,John stays in the air

Correct Answer
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A motorist makes a trip of 180 miles.For the first 90 miles she drives at a constant speed of 30 mph.At what constant speed must she drive the remaining distance if her average speed for the total trip is to be 40 mph?

Correct Answer
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Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at as it passed the top of the flagpole? Neglect air resistance.

Correct Answer
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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 Answer
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The figure shows a graph of the velocity of an object as a function of time.What is the displacement of the object from 0 s to 6.0 s?

Correct Answer
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A ball is thrown downward in the absence of air resistance.After it has been released,which statement(s) concerning its acceleration is correct? (There could be more than one correct choice. )

Correct Answer
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If the velocity of an object is zero at some point,then its acceleration must also be zero at that point.

Correct Answer
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A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and experience no significant air resistance.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

Correct Answer
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The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

Correct Answer
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Correct Answer
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An object is moving in a straight line with constant acceleration.Initially it is traveling at 16 m/s.Three seconds later it is traveling at 10 m/s.How far does it move during this time?

Correct Answer
verified

The graph in the figure shows the velocity of a particle as it travels along the x-axis.What is the magnitude of the average acceleration of the particle between t = 1.0 s and t = 4.0 s?

Correct Answer
verified

Exam 2: One-Dimensional Kinematics

The area under a curve in a velocity versus time graph gives

Correct AnswerverifiedShow Answer

Two cars are traveling at the same speed and hit the brakes at the same time.Car A decelerates (decreases its velocity) at twice the rate of car B.If car B takes time T to stop,how long does it take car A to stop?

Correct AnswerverifiedShow Answer

If the velocity of an object is zero at one instant,what is true about the acceleration of that object? (There could be more than one correct choice. )

Correct AnswerverifiedShow Answer

A ball is thrown straight upward from ground level with a speed of 18 m/s. How much time passes before the ball strikes the ground if we disregard air resistance?

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

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light.Which statement concerning its acceleration must be correct?

Correct AnswerverifiedShow Answer

An object starts from rest and undergoes uniform acceleration.During the first second it travels 5.0 m.How far will it travel during the third second?

Correct AnswerverifiedShow Answer

A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m.She completes one lap in 100 seconds.What is her average velocity?

Correct AnswerverifiedShow Answer

Two athletes jump straight up.John has twice the initial speed of Harry.Compared to Harry,John stays in the air

Correct AnswerverifiedShow Answer

A motorist makes a trip of 180 miles.For the first 90 miles she drives at a constant speed of 30 mph.At what constant speed must she drive the remaining distance if her average speed for the total trip is to be 40 mph?

Correct AnswerverifiedShow Answer

Abby throws a ball straight up and times it.She sees that the ball goes by the top of a flagpole after 0.50 s and reaches the level of the top of the pole after a total elapsed time of 4.1 s.What was the speed of the ball at as it passed the top of the flagpole? Neglect air resistance.

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 figure shows a graph of the velocity of an object as a function of time.What is the displacement of the object from 0 s to 6.0 s?

Correct AnswerverifiedShow Answer

A ball is thrown downward in the absence of air resistance.After it has been released,which statement(s) concerning its acceleration is correct? (There could be more than one correct choice. )

Correct AnswerverifiedShow Answer

If the velocity of an object is zero at some point,then its acceleration must also be zero at that point.

Correct AnswerverifiedShow Answer

A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience no significant air resistance.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

Correct AnswerverifiedShow Answer

The graph in the figure shows the position of a particle as it travels along the x-axis. At what value of t is the speed of the particle equal to 0 m/s?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An object is moving in a straight line with constant acceleration.Initially it is traveling at 16 m/s.Three seconds later it is traveling at 10 m/s.How far does it move during this time?

Correct AnswerverifiedShow Answer

The graph in the figure shows the velocity of a particle as it travels along the x-axis.What is the magnitude of the average acceleration of the particle between t = 1.0 s and t = 4.0 s?

Correct AnswerverifiedShow Answer

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A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v₀ and experience no significant air resistance.If the 10-kg rock reaches a maximum height h,what maximum height will the 20-kg ball reach?

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