Question 1

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 m

Question 2

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/s

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.

Question 4

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.

Question 5

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.

Question 6

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 m

Question 7

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?

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/s2

Question 8

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 2

Question 9

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 s

Question 10

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 m

Question 11

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) 4h

Question 12

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 mph

Question 13

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 14

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.

Question 15

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 s

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.

Question 17

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/4

Question 18

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

Accepted Answer

A) acceleration. 
B) velocity. 
C) displacement. 
D) position.

Question 19

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/s

Question 20

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 downward

Exam 2: One-Dimensional Kinematics