Question 1

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

Question 2

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)  48 km/h 
D)  53 km/h 
E)  80 km/h

Question 3

The coordinate of a particle in meters is given by x(t) = 16t - 3.0t3, where the time t is in seconds. The particle is momentarily at rest at t =

Accepted Answer

A)  0.75 s 
B)  1.3 s 
C)  5.3 s 
D)  7.3 s 
E)  9.3 s

Question 4

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

Question 5

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

Accepted Answer

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

Question 6

The graph represents the straight line motion of a car. How far does the car travel between t = 2 seconds and t = 5 seconds?

Accepted Answer

A)  4 m 
B)  12 m 
C)  24 m 
D)  36 m 
E)  60 m

Question 7

The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt2. The dimensions of the quantities a and b are respectively:

Accepted Answer

A)  L2/T, L3/T2 
B)  L/T2, L2/T 
C)  L/T, L/T2 
D)  L3/T, T2/L 
E)  none of these

Question 8

A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0. What is the average acceleration from the third to the eighth second?

Accepted Answer

A)  2.5 cm/s2 
B)  4.0 cm/s2 
C)  5.0 cm/s2 
D)  6.0 cm/s2 
E)  6.67 cm/s2

Question 9

A drag racing car starts from rest at t = 0 and moves along a straight line with velocity given by v = bt2, where b is a constant. The expression for the distance traveled by this car from its position at t = 0 is:

Accepted Answer

A)  bt3 
B)  bt3/3 
C)  4bt2 
D)  3bt2 
E)  bt3/2

Question 10

A particle moves along the x axis from xi to x f . Of the following values of the initial and final coordiantes, which results in a negative displacement?

Accepted Answer

A)  xi = 4m, x f = 6m 
B)  xi = -4m, x f = -8m 
C)  xi = -4m, x f = 2m 
D)  xi = -4m, x f = -2m 
E)  xi = -4m, x f = 4m

Question 11

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:

Accepted Answer

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

Question 12

How far does a car travel in 6 s if its initial velocity is 2 m/s and its acceleration is 2 m/s2 in the forward direction?

Accepted Answer

A)  12 m 
B)  14 m 
C)  24 m 
D)  36 m 
E)  48 m

Question 13

Which of the following five coordinate versus time graphs represents the motion of an object whose speed is increasing?

Accepted Answer

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

Question 14

A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is:

Accepted Answer

A)  4.9 m 
B)  7.4 m 
C)  19.4 m 
D)  38.8 m 
E)  19.6 m

Question 15

An object is shot vertically upward. While it is rising:

Accepted Answer

A)  its velocity and acceleration are both upward 
B)  its velocity is upward and its acceleration is downward 
C)  its velocity and acceleration are both downward 
D)  its velocity is downward and its acceleration is upward 
E)  its velocity and acceleration are both decreasing

Question 16

An object starts from rest at the origin and moves along the x axis with a constant acceleration of 4 m/s2. Its average velocity as it goes from x = 2 m to x = 8 m is:

Accepted Answer

A)  1 m/s 
B)  2 m/s 
C)  3 m/s 
D)  5 m/s 
E)  6 m/s

Question 17

Which of the following five coordinate versus time graphs represents the motion of an object whose speed is increasing?

Accepted Answer

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

Question 18

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

Question 19

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

Question 20

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)  12 m 
B)  24 m 
C)  36 m 
D)  54 m 
E)  144 m

Exam 2: Motion Along a Straight Line

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:

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:

The coordinate of a particle in meters is given by x(t) = 16t - 3.0t³, where the time t is in seconds. The particle is momentarily at rest at t =

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

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

The graph represents the straight line motion of a car. How far does the car travel between t = 2 seconds and t = 5 seconds?

The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt². The dimensions of the quantities a and b are respectively:

A ball rolls up a slope. At the end of three seconds its velocity is 20 cm/s; at the end of eight seconds its velocity is 0. What is the average acceleration from the third to the eighth second?

A drag racing car starts from rest at t = 0 and moves along a straight line with velocity given by v = bt², where b is a constant. The expression for the distance traveled by this car from its position at t = 0 is:

A particle moves along the x axis from x_i to x_f. Of the following values of the initial and final coordiantes, which results in a negative displacement?

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:

How far does a car travel in 6 s if its initial velocity is 2 m/s and its acceleration is 2 m/s² in the forward direction?

Which of the following five coordinate versus time graphs represents the motion of an object whose speed is increasing?

A baseball is hit straight up and is caught by the catcher 2.0 s later. The maximum height of the ball during this interval is:

An object is shot vertically upward. While it is rising:

An object starts from rest at the origin and moves along the x axis with a constant acceleration of 4 m/s². Its average velocity as it goes from x = 2 m to x = 8 m is:

Which of the following five coordinate versus time graphs represents the motion of an object whose speed is increasing?

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.

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 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: