Question 1

The diagram shows a velocity-time graph for a car moving in a straight line. At point Q the car must be:

Accepted Answer

A)  moving with zero acceleration 
B)  traveling downhill 
C)  traveling below ground-level 
D)  reducing speed 
E)  traveling in the reverse direction to that at point P 
A)  moving with zero acceleration 
B)  traveling downhill 
C)  traveling below ground-level 
D)  reducing speed 
E)  traveling in the reverse direction to that at point P

Question 2

The average speed of a moving object during a given interval of time is always:

Accepted Answer

A)  the magnitude of its average velocity over the interval 
B)  the distance covered during the time interval divided by the time interval 
C)  one-half its speed at the end of the interval 
D)  its acceleration multiplied by the time interval 
E)  one-half its acceleration multiplied by the time interval. 
A)  the magnitude of its average velocity over the interval 
B)  the distance covered during the time interval divided by the time interval 
C)  one-half its speed at the end of the interval 
D)  its acceleration multiplied by the time interval 
E)  one-half its acceleration multiplied by the time interval.

Question 3

At a location where g = 9.80 m/s2, an object is thrown vertically down with an initial speed of 1.00 m/s. After 5.00 s the object will have traveled:

Accepted Answer

A)  125 m 
B)  128 m 
C)  245 m 
D)  250 m 
E)  255 m 
A)  125 m 
B)  128 m 
C)  245 m 
D)  250 m 
E)  255 m

Question 4

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s2. The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect air resistance.

Accepted Answer

A)  one fourth 
B)  half 
C)  twice 
D)  four times 
E)  cannot be calculated from the given data 
A)  one fourth 
B)  half 
C)  twice 
D)  four times 
E)  cannot be calculated from the given data

Question 5

This graph shows the position of a particle as a function of time. What is its average velocity between t = 5s and t = 9s?

Accepted Answer

A)  3 m/s 
B)  -3 m/s 
C)  12 m/s 
D)  -12 m/s 
E)  Need additional information. 
A)  3 m/s 
B)  -3 m/s 
C)  12 m/s 
D)  -12 m/s 
E)  Need additional information.

Question 6

An object dropped from a window of a tall building hits the ground in 12.0 s. If its acceleration is 9.80 m/s2, the height of the window above the ground is (you may neglect air resistance):

Accepted Answer

A)  29.4 m 
B)  58.8 m 
C)  118 m 
D)  353 m 
E)  706 m 
A)  29.4 m 
B)  58.8 m 
C)  118 m 
D)  353 m 
E)  706 m

Question 7

A particle moves from point x1 to point x2. Its displacement is given by:

Accepted Answer

A)  x2 - x1 
B)  x1 - x2 
C)  x1 + x2 
D)  x1 
E)  x2 
A)  x2 - x1 
B)  x1 - x2 
C)  x1 + x2 
D)  x1 
E)  x2

Question 8

Each of four particles moves along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by   Which of these particles have constant acceleration?

Accepted Answer

A)  All four 
B)  Only 1 and 2 
C)  Only 2 and 3 
D)  Only 3 and 4 
E)  None of them 
A)  All four 
B)  Only 1 and 2 
C)  Only 2 and 3 
D)  Only 3 and 4 
E)  None of them

Question 9

When can you treat a moving object as if it were a point-like particle?

Accepted Answer

A)  Only if it really is a point-like particle. 
B)  You can always treat a moving object as if it were a point-like particle. 
C)  Only if the object is moving with constant acceleration. 
D)  Only if all parts of the object are moving in the same direction and at the same rate. 
E)  This question has no physical meaning. 
A)  Only if it really is a point-like particle. 
B)  You can always treat a moving object as if it were a point-like particle. 
C)  Only if the object is moving with constant acceleration. 
D)  Only if all parts of the object are moving in the same direction and at the same rate. 
E)  This question has no physical meaning.

Question 10

Can an object have positive acceleration and decreasing speed?

Accepted Answer

A)  No, this is not possible. 
B)  Yes, speed will always decrease if acceleration is positive. 
C)  Yes, this is possible if the initial velocity is zero. 
D)  Yes, this is possible if the initial velocity is negative. 
E)  Yes, this is possible but only if the object is moving in two dimensions. 
A)  No, this is not possible. 
B)  Yes, speed will always decrease if acceleration is positive. 
C)  Yes, this is possible if the initial velocity is zero. 
D)  Yes, this is possible if the initial velocity is negative. 
E)  Yes, this is possible but only if the object is moving in two dimensions.

Question 11

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by a = -0.50t, in m/s2 for t in seconds. By the time it stops it has traveled:

Accepted Answer

A)  15 m 
B)  31 m 
C)  62 m 
D)  85 m 
E)  100 m 
A)  15 m 
B)  31 m 
C)  62 m 
D)  85 m 
E)  100 m

Question 12

Which of the following is NOT true of an object in free fall in the absence of air resistance?

Accepted Answer

A)  Its acceleration is constant. 
B)  If its initial velocity is upwards, it will reach a maximum height and then begin to fall. 
C)  If its initial velocity is zero, its position below its starting point can be calculated knowing only how long ago it began falling. 
D)  Its velocity will always be zero at some point along its path. 
E)  Its velocity changes by the same amount every second. 
A)  Its acceleration is constant. 
B)  If its initial velocity is upwards, it will reach a maximum height and then begin to fall. 
C)  If its initial velocity is zero, its position below its starting point can be calculated knowing only how long ago it began falling. 
D)  Its velocity will always be zero at some point along its path. 
E)  Its velocity changes by the same amount every second.

Question 13

One object is thrown vertically upward with an initial velocity of 100 m/s and another object with an initial velocity of 10 m/s. The maximum height reached by the first object will be _______ that of the other.

Accepted Answer

A)  10 times 
B)  100 times 
C)  1000 times 
D)  10,000 times 
E)  none of these 
A)  10 times 
B)  100 times 
C)  1000 times 
D)  10,000 times 
E)  none of these

Question 14

An object is thrown vertically upward at 35 m/s. Taking g = 10 m/s2, the velocity of the object 5 seconds later is:

Accepted Answer

A)  7.0 m/s up 
B)  15 m/s down 
C)  15 m/s up 
D)  85 m/s down 
E)  85 m/s up 
A)  7.0 m/s up 
B)  15 m/s down 
C)  15 m/s up 
D)  85 m/s down 
E)  85 m/s up

Question 15

A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither. The time for this round trip is 2 hours. The average speed of the car for this round trip is:

Accepted Answer

A)  0 km/h 
B)  25 km/h 
C)  50 km/h 
D)  100 km/h 
E)  cannot be calculated without knowing the acceleration 
A)  0 km/h 
B)  25 km/h 
C)  50 km/h 
D)  100 km/h 
E)  cannot be calculated without knowing the acceleration

Question 16

The acceleration of an object, starting from rest, is shown in the graph below. Other than at t = 0, when is the velocity of the object equal to zero?

Accepted Answer

A)  During the interval from 1.0 s to 3.0 s 
B)  At t = 3.5 s 
C)  At t = 4.0 s 
D)  At t = 5.0 s 
E)  At no other time less than or equal to 5 s. 
A)  During the interval from 1.0 s to 3.0 s 
B)  At t = 3.5 s 
C)  At t = 4.0 s 
D)  At t = 5.0 s 
E)  At no other time less than or equal to 5 s.

Question 17

An object is released from rest. How far does it fall during the second second of its fall?

Accepted Answer

A)  4.9 m 
B)  9.8 m 
C)  15 m 
D)  20 m 
E)  25 m 
A)  4.9 m 
B)  9.8 m 
C)  15 m 
D)  20 m 
E)  25 m

Question 18

A ball is thrown upwards. Its acceleration is:

Accepted Answer

A)  downward during both ascent and descent 
B)  downward during ascent and upward during descent 
C)  upward during ascent and downward during descent 
D)  upward during both ascent and descent 
E)  downward at all times except at the very top, when it is zero 
A)  downward during both ascent and descent 
B)  downward during ascent and upward during descent 
C)  upward during ascent and downward during descent 
D)  upward during both ascent and descent 
E)  downward at all times except at the very top, when it is zero

Question 19

A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. The average speed of the car for this 80 km trip is:

Accepted Answer

A)  40 km/h 
B)  45 km/h 
C)  53 km/h 
D)  60 km/h 
E)  80 km/h 
A)  40 km/h 
B)  45 km/h 
C)  53 km/h 
D)  60 km/h 
E)  80 km/h

Question 20

A baseball is hit straight up and is caught by the catcher 2.0 s later, at the same height at which it left the bat. The maximum height of the ball during this interval is:

Accepted Answer

A)  4.9 m 
B)  7.4 m 
C)  12.4 m 
D)  19.6 m 
E)  38.8 m 
A)  4.9 m 
B)  7.4 m 
C)  12.4 m 
D)  19.6 m 
E)  38.8 m

Exam 2: Motion Along a Straight Line

The diagram shows a velocity-time graph for a car moving in a straight line. At point Q the car must be:

The average speed of a moving object during a given interval of time is always:

At a location where g = 9.80 m/s2, an object is thrown vertically down with an initial speed of 1.00 m/s. After 5.00 s the object will have traveled:

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s2. The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect air resistance.

This graph shows the position of a particle as a function of time. What is its average velocity between t = 5s and t = 9s?

An object dropped from a window of a tall building hits the ground in 12.0 s. If its acceleration is 9.80 m/s2, the height of the window above the ground is (you may neglect air resistance):

A particle moves from point x1 to point x2. Its displacement is given by:

Each of four particles moves along an x axis. Their coordinates (in meters) as functions of time (in seconds) are given by Which of these particles have constant acceleration?

When can you treat a moving object as if it were a point-like particle?

Can an object have positive acceleration and decreasing speed?

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by a = -0.50t, in m/s2 for t in seconds. By the time it stops it has traveled:

Which of the following is NOT true of an object in free fall in the absence of air resistance?

One object is thrown vertically upward with an initial velocity of 100 m/s and another object with an initial velocity of 10 m/s. The maximum height reached by the first object will be _______ that of the other.

An object is thrown vertically upward at 35 m/s. Taking g = 10 m/s2, the velocity of the object 5 seconds later is:

A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither. The time for this round trip is 2 hours. The average speed of the car for this round trip is:

The acceleration of an object, starting from rest, is shown in the graph below. Other than at t = 0, when is the velocity of the object equal to zero?

An object is released from rest. How far does it fall during the second second of its fall?

A ball is thrown upwards. Its acceleration is:

A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h. The average speed of the car for this 80 km trip is:

A baseball is hit straight up and is caught by the catcher 2.0 s later, at the same height at which it left the bat. The maximum height of the ball during this interval is:

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At a location where g = 9.80 m/s², an object is thrown vertically down with an initial speed of 1.00 m/s. After 5.00 s the object will have traveled:

An object is thrown vertically upward with a certain initial velocity in a world where the acceleration due to gravity is 19.6 m/s². The height to which it rises is ____ that to which the object would rise if thrown upward with the same initial velocity on the Earth. Neglect air resistance.

An object dropped from a window of a tall building hits the ground in 12.0 s. If its acceleration is 9.80 m/s², the height of the window above the ground is (you may neglect air resistance):

A particle moves from point x₁ to point x₂. Its displacement is given by:

At time t = 0 a car has a velocity of 16 m/s. It slows down with an acceleration given by a = -0.50t, in m/s² for t in seconds. By the time it stops it has traveled:

An object is thrown vertically upward at 35 m/s. Taking g = 10 m/s², the velocity of the object 5 seconds later is: