Question 1

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s2 its distance above ground level 1.0 second later is:

Accepted Answer

A)  40 m 
B)  45 m 
C)  50 m 
D)  55 m 
E)  60 m

Question 2

Which one of the following statements is correct for an object released from rest?

Accepted Answer

A)  The average velocity during the first second of time is 4.9 m/s 
B)  During each second the object falls 9.8 m 
C)  The acceleration changes by 9.8 m/s every second 
D)  The object falls 9.8 m during the first second of time 
E)  The acceleration of the object is proportional to its weight

Question 3

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

Question 4

At a stop light, a truck traveling at 15 m/s passes a car as it starts from rest. The truck travels at constant velocity and the car accelerates at 3 m/s2. How much time does the car take to catch up to the truck?

Accepted Answer

A)  5 s 
B)  10 s 
C)  15 s 
D)  20 s 
E)  25 s

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

Question 6

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

Question 7

A car, initially at rest, travels 20 m in 4 s along a straight line with constant acceleration. The acceleration of the car is:

Accepted Answer

A)  0.4 m/s2 
B)  1.3 m/s2 
C)  2.5 m/s2 
D)  4.9 m/s2 
E)  9.8 m/s2

Question 8

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)  127.5 m 
C)  245 m 
D)  250 m 
E)  255 m

Question 9

A stone is released from rest from the edge of a building roof 190 m above the ground. Neglecting air resistance, the speed of the stone, just before striking the ground, is:

Accepted Answer

A)  43 m/s 
B)  61 m/s 
C)  120 m/s 
D)  190 m/s 
E)  1400 m/s

Question 10

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

Question 11

An object has a constant acceleration of 3 m/s2. The displacement versus time graph for this object has a slope:

Accepted Answer

A)  that increases with time 
B)  that is constant 
C)  that decreases with time 
D)  of 3 m/s 
E)  of 3 m/s2

Question 12

A ball is in free fall. 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

Question 13

The coordinate of an object is given as a function of time by x = 4t2 - 3t3, where x is in meters and t is in seconds. Its average acceleration over the interval from t = 0 to t = 2 s is:

Accepted Answer

A)  -4 m/s2 
B)  4 m/s2 
C)  -10 m/s2 
D)  10 m/s2 
E)  -13 m/s2

Question 14

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

Question 15

Over a short interval, starting at time t = 0, the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t3, where t is in seconds. The magnitudes of the initial (at t = 0) velocity and acceleration of the auto respectively are:

Accepted Answer

A)  0; 12 m/s2 
B)  0; 24 m/s2 
C)  27 m/s; 0 
D)  27 m/s; 12 m/s2 
E)  27 m/s; 24 m/s2

Question 16

The coordinate of an object is given as a function of time by x = 7t - 3t2, where x is in meters and t is in seconds. Its average velocity over the interval from t = 0 to t = 2 s is:

Accepted Answer

A)  5 m/s 
B)  -5 m/s 
C)  11 m/s 
D)  -11 m/s 
E)  -14.5 m/s

Question 17

A ball is in free fall. 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

Question 18

The coordinate-time graph of an object is a straight line with a positive slope. The object has:

Accepted Answer

A)  constant displacement 
B)  steadily increasing acceleration 
C)  steadily decreasing acceleration 
D)  constant velocity 
E)  steadily increasing velocity

Question 19

A heavy ball falls freely, starting from rest. Between the third and fourth second of time it travels a distance of:

Accepted Answer

A)  4.9 m. 
B)  9.8 m. 
C)  29.4 m 
D)  34.3 m. 
E)  39.8 m.

Question 20

A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is:

Accepted Answer

A)  zero 
B)  g, down 
C)  g, up 
D)  2g. down 
E)  2g, up

Exam 2: Motion Along a Straight Line

An object is thrown straight up from ground level with a speed of 50 m/s. If g = 10 m/s² its distance above ground level 1.0 second later is:

Which one of the following statements is correct for an object released from rest?

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?

At a stop light, a truck traveling at 15 m/s passes a car as it starts from rest. The truck travels at constant velocity and the car accelerates at 3 m/s². How much time does the car take to catch up to the truck?

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:

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:

A car, initially at rest, travels 20 m in 4 s along a straight line with constant acceleration. The acceleration of the car is:

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:

A stone is released from rest from the edge of a building roof 190 m above the ground. Neglecting air resistance, the speed of the stone, just before striking the ground, is:

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

An object has a constant acceleration of 3 m/s². The displacement versus time graph for this object has a slope:

A ball is in free fall. Its acceleration is:

The coordinate of an object is given as a function of time by x = 4t² - 3t³, where x is in meters and t is in seconds. Its average acceleration over the interval from t = 0 to t = 2 s 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?

Over a short interval, starting at time t = 0, the coordinate of an automobile in meters is given by x(t) = 27t - 4.0t³, where t is in seconds. The magnitudes of the initial (at t = 0) velocity and acceleration of the auto respectively are:

The coordinate of an object is given as a function of time by x = 7t - 3t², where x is in meters and t is in seconds. Its average velocity over the interval from t = 0 to t = 2 s is:

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

The coordinate-time graph of an object is a straight line with a positive slope. The object has:

A heavy ball falls freely, starting from rest. Between the third and fourth second of time it travels a distance of:

A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is: