PHYSICS 131 TEST 1 QUESTIONS AND ANSWERS
Which one of the following is a vector quantity?
A. speed
B. velocity
C. time
D. mass - Answers - B. Velocity
If two objects are moving in different directions,
A. they could not have the same speed
B. they could not have the same velocity
C. both of these
D. neither of these - Answers - B. they could not have the same velocity
An object traveling east slows down from 100 m/s to 40 m/s in 10 sec. The acceleration
of this object would be,
A. 14 m/s east
B. 6 m/s^2 east
C. 6 m/s^2 west
D. none of these - Answers - C. 6 m/s^2 west
If the acceleration of an object initially moving North at 20 m/s is 5 m/s^2 South, after
four seconds the speed of the object would be,
A. 0
B. 4 m/s
C. 40 m/s
D. 100 m/s - Answers - A. 0
A ball is thrown upward. At its highest point , which of these would not be equal to zero?
A. the speed of the object
B. the velocity of the object
C. the acceleration of the object
D. all of these would be equal to zero - Answers - C. the acceleration of the object
At the edge of a cliff, one object is thrown upward at 20 m/s, and another object is
thrown downward at 20 m/s. Right after the two objects are thrown,
A. their speeds will both increase
B. their speeds will both decrease
C. their accelerations will be the same
D. their accelerations will be opposite - Answers - C. their accelerations will be the same
A freely falling object is dropped from rest. Five seconds after being dropped, the speed
of the object will be
A. 50 m/s
B. 125 m/s
, C. 10 m/s
D. -50 m/s - Answers - A. 50 m/s
This question concerns a freely-falling object thrown upward at 40 m/s.
How much time elapses before the object returns from its initial height?
A. 4s
B. 8s
C. 10s
D. 40s - Answers - B. 8s
This question concerns a freely-falling object thrown upward at 40 m/s.
What is the maximum height the object will reach?
A. 160m
B. 80m
C. 320m
D. 240m - Answers - B. 80m
This question concerns a freely-falling object thrown upward at 40 m/s.
After 6s, what is the object's speed?
A. 20 m/s
B. 40 m/s
C. 60 m/s
D. 100 m/s - Answers - A. 20 m/s
A ball is rolled horizontally off the top of a table. If the ball's initial horizontal speed were
increased, which of the following would not change?
A. the landing spot of the ball
B. the final speed of the ball
C. the time it takes the ball to land
D. all of these would change - Answers - C. the time it takes the ball to land
For an object in projectile motion, which component of its velocity will change?
A. the horizontal component
B. the vertical component
C. Both
D. Neither - Answers - B. the vertical component
A ball is launched at an angle of 20 degrees, and another ball is launched at the same
speed at an angle of 70 degrees. Which of the following statements is correct?
A. the balls will reach the same height
B. the balls will have the same range
C. the balls will hit the ground at the same time
D. all of the above - Answers - B. the balls will have the same range
Which one of the following is a vector quantity?
A. speed
B. velocity
C. time
D. mass - Answers - B. Velocity
If two objects are moving in different directions,
A. they could not have the same speed
B. they could not have the same velocity
C. both of these
D. neither of these - Answers - B. they could not have the same velocity
An object traveling east slows down from 100 m/s to 40 m/s in 10 sec. The acceleration
of this object would be,
A. 14 m/s east
B. 6 m/s^2 east
C. 6 m/s^2 west
D. none of these - Answers - C. 6 m/s^2 west
If the acceleration of an object initially moving North at 20 m/s is 5 m/s^2 South, after
four seconds the speed of the object would be,
A. 0
B. 4 m/s
C. 40 m/s
D. 100 m/s - Answers - A. 0
A ball is thrown upward. At its highest point , which of these would not be equal to zero?
A. the speed of the object
B. the velocity of the object
C. the acceleration of the object
D. all of these would be equal to zero - Answers - C. the acceleration of the object
At the edge of a cliff, one object is thrown upward at 20 m/s, and another object is
thrown downward at 20 m/s. Right after the two objects are thrown,
A. their speeds will both increase
B. their speeds will both decrease
C. their accelerations will be the same
D. their accelerations will be opposite - Answers - C. their accelerations will be the same
A freely falling object is dropped from rest. Five seconds after being dropped, the speed
of the object will be
A. 50 m/s
B. 125 m/s
, C. 10 m/s
D. -50 m/s - Answers - A. 50 m/s
This question concerns a freely-falling object thrown upward at 40 m/s.
How much time elapses before the object returns from its initial height?
A. 4s
B. 8s
C. 10s
D. 40s - Answers - B. 8s
This question concerns a freely-falling object thrown upward at 40 m/s.
What is the maximum height the object will reach?
A. 160m
B. 80m
C. 320m
D. 240m - Answers - B. 80m
This question concerns a freely-falling object thrown upward at 40 m/s.
After 6s, what is the object's speed?
A. 20 m/s
B. 40 m/s
C. 60 m/s
D. 100 m/s - Answers - A. 20 m/s
A ball is rolled horizontally off the top of a table. If the ball's initial horizontal speed were
increased, which of the following would not change?
A. the landing spot of the ball
B. the final speed of the ball
C. the time it takes the ball to land
D. all of these would change - Answers - C. the time it takes the ball to land
For an object in projectile motion, which component of its velocity will change?
A. the horizontal component
B. the vertical component
C. Both
D. Neither - Answers - B. the vertical component
A ball is launched at an angle of 20 degrees, and another ball is launched at the same
speed at an angle of 70 degrees. Which of the following statements is correct?
A. the balls will reach the same height
B. the balls will have the same range
C. the balls will hit the ground at the same time
D. all of the above - Answers - B. the balls will have the same range
