Question 1

A ball is in free fall motion.Upward is taken to be the positive direction.The displacement of the ball is:

Accepted Answer

A) positive during both ascent and descent 
B) negative during both ascent and descent 
C) negative during ascent and positive during descent 
D) positive during ascent and negative during descent 
E) none of the above 
A) positive during both ascent and descent 
B) negative during both ascent and descent 
C) negative during ascent and positive during descent 
D) positive during ascent and negative during descent 
E) none of the above D

Question 2

A car accelerates from rest on a straight road.A short time later, the car decelerates to a stop and then returns to its original position in a similar manner, by speeding up and then slowing to a stop.Which of the following five coordinate versus time graphs best describes the motion?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V E

Question 3

A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s2 south.After 6 seconds its velocity will be:

Accepted Answer

A) 7 m/s north 
B) 7 m/s south 
C) 43 m/s north 
D) 20 m/s north 
E) 20 m/s south 
A) 7 m/s north 
B) 7 m/s south 
C) 43 m/s north 
D) 20 m/s north 
E) 20 m/s south A

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

A projectile is shot vertically upward with a given initial velocity.It reaches a maximum height of 100 m.If on a second shot the initial velocity is doubled, then the projectile will reach a maximum height of:

Accepted Answer

A) 70.7 m 
B) 141.4 m 
C) 200 m 
D) 241 m 
E) 400 m 
A) 70.7 m 
B) 141.4 m 
C) 200 m 
D) 241 m 
E) 400 m

Question 6

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 7

Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration could be:

Accepted Answer

A) positive and negative, respectively 
B) negative and positive, respectively 
C) negative and negative, respectively 
D) negative and zero, respectively 
E) positive and zero, respectively 
A) positive and negative, respectively 
B) negative and positive, respectively 
C) negative and negative, respectively 
D) negative and zero, respectively 
E) positive and zero, respectively

Question 8

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 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

A feather, initially at rest, is released in a vacuum 12 m above the surface of the Earth.Which of the following statements is correct?

Accepted Answer

A) The maximum velocity of the feather is 9.8 m/s 
B) The acceleration of the feather decreases until terminal velocity is reached 
C) The acceleration of the feather remains constant during the fall 
D) The acceleration of the feather increases during the fall 
E) The acceleration of the feather is zero 
A) The maximum velocity of the feather is 9.8 m/s 
B) The acceleration of the feather decreases until terminal velocity is reached 
C) The acceleration of the feather remains constant during the fall 
D) The acceleration of the feather increases during the fall 
E) The acceleration of the feather is zero

Question 11

Which of the following five coordinate versus time graphs represents the motion of an object moving with a constant nonzero speed?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 12

An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s2 west for 3 seconds.During this time the object travels a distance of:

Accepted Answer

A) 18 m 
B) 24 m 
C) 36 m 
D) 54 m 
E) 144 m 
A) 18 m 
B) 24 m 
C) 36 m 
D) 54 m 
E) 144 m

Question 13

An object is dropped from rest.Which of the five following graphs correctly represents its motion? The positive direction is taken to be upward.Take careful note of the axes.

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 14

Consider the following five graphs (note the axes carefully).Which of these represent(s)motion at constant speed?

Accepted Answer

A) IV only 
B) IV and V only 
C) I, II, and III only 
D) I and II only 
E) I and IV only 
A) IV only 
B) IV and V only 
C) I, II, and III only 
D) I and II only 
E) I and IV only

Question 15

Which of the following five acceleration versus time graphs is correct for an object moving in a straight line at a constant velocity of 20 m/s?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
E) V 
A) I 
B) II 
C) III 
D) IV 
E) V

Question 16

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 magnitude of the average velocity of the car for this round trip is:

Accepted Answer

A) 0 km/hr 
B) 50 km/hr 
C) 100 km/hr 
D) 200 km/hr 
E) cannot be calculated without knowing the acceleration 
A) 0 km/hr 
B) 50 km/hr 
C) 100 km/hr 
D) 200 km/hr 
E) cannot be calculated without knowing the acceleration

Question 17

An object is thrown straight down with an initial speed of 4 m/s from a window which is 8 m above the ground.The time it takes the object to reach the ground is:

Accepted Answer

A) 0.80 s 
B) 0.93 s 
C) 1.3 s 
D) 1.7 s 
E) 2.0 s 
A) 0.80 s 
B) 0.93 s 
C) 1.3 s 
D) 1.7 s 
E) 2.0 s

Question 18

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.It stops at t =

Accepted Answer

A) 64 s 
B) 32 s 
C) 16 s 
D) 8.0 s 
E) 4.0 s 
A) 64 s 
B) 32 s 
C) 16 s 
D) 8.0 s 
E) 4.0 s

Question 19

Starting at time t = 0, an object moves along a straight line.Its coordinate in meters is given by x(t)= 75t - 1.0t3, where t is in seconds.When it momentarily stops its acceleration is:

Accepted Answer

A) 0 m/s2 
B) -73 m/s2 
C) -30 m/s2 
D) -9.8 m/s2 
E) 9.2 x 103 m/s2 
A) 0 m/s2 
B) -73 m/s2 
C) -30 m/s2 
D) -9.8 m/s2 
E) 9.2 x 103 m/s2

Question 20

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.

Exam 2: Motion Along a Straight Line

A ball is in free fall motion.Upward is taken to be the positive direction.The displacement of the ball is:

A car accelerates from rest on a straight road.A short time later, the car decelerates to a stop and then returns to its original position in a similar manner, by speeding up and then slowing to a stop.Which of the following five coordinate versus time graphs best describes the motion?

A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s2 south.After 6 seconds its velocity will be:

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.

A projectile is shot vertically upward with a given initial velocity.It reaches a maximum height of 100 m.If on a second shot the initial velocity is doubled, then the projectile will reach a maximum height of:

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:

Throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration could be:

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

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

A feather, initially at rest, is released in a vacuum 12 m above the surface of the Earth.Which of the following statements is correct?

Which of the following five coordinate versus time graphs represents the motion of an object moving with a constant nonzero speed?

An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s2 west for 3 seconds.During this time the object travels a distance of:

An object is dropped from rest.Which of the five following graphs correctly represents its motion? The positive direction is taken to be upward.Take careful note of the axes.

Consider the following five graphs (note the axes carefully).Which of these represent(s)motion at constant speed?

Which of the following five acceleration versus time graphs is correct for an object moving in a straight line at a constant velocity of 20 m/s?

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 magnitude of the average velocity of the car for this round trip is:

An object is thrown straight down with an initial speed of 4 m/s from a window which is 8 m above the ground.The time it takes the object to reach the ground is:

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.It stops at t =

Starting at time t = 0, an object moves along a straight line.Its coordinate in meters is given by x(t)= 75t - 1.0t3, where t is in seconds.When it momentarily stops its acceleration is:

Can an object have positive acceleration and decreasing speed?

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A car moving with an initial velocity of 25 m/s north has a constant acceleration of 3 m/s² south.After 6 seconds its velocity will be:

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.

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 with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s² west for 3 seconds.During this time the object travels a distance of:

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.It stops at t =

Starting at time t = 0, an object moves along a straight line.Its coordinate in meters is given by x(t)= 75t - 1.0t³, where t is in seconds.When it momentarily stops its acceleration is: