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1. How is velocity different from speed?
A. Velocity is speed in a given direction.
B. They are measured in different units
C. Velocity is used for natural objects , but speed is used
only for machines.
2. A ball tossed vertically upward rises, reaches its
highest point, and then falls back to its starting point.
During this time the acceleration of the ball is always
A. directed downward.
B. opposite its velocity.
C. directed upward.
D. in the direction of motion.
3. A vector is a quantity that has
A. time and direction.
B. magnitude and direction.
C. magnitude and time.
4. Acceleration is defined as
A. the distance an object has fallen.
B. the rate at which velocity changes.
C. the rate at which distance is covered.
D. the rate at which an object freely falls from rest.
5. A pencil lies on your desk. If the Earth is moving
around the sun at a speed of 30 km/s, how fast is the
pencil moving relative to the desk? How fast is the
pencil moving relative to the sun?
A. 30 km/s; 0 km/s
B. 0 km/s; 30 km/s
C. 30 km/s; 30 km/s
D. 0 km/s; 0 km/s
6. In the absence of air resistance, objects fall at constant
A. acceleration.
B. distances each second.
C. speed.
D. velocity.
E. all of the above
7. Consider drops of water leaking from a water faucet.
As the drops fall they
A. get farther apart.
B. remain the same distance from each other.
C. get closer together.
8. Which of the following is a possible unit of speed?
a. kilometers per second.
b. miles per minute.
c. centimeters per year.
d. all of the above.
e. none of the above.
9. A ball is thrown straight up. At the top of its path its
instantaneous speed is
A. about 50 m/s.
B. about 20 m/s.
C. about 5 m/s.
D. 0 m/s.
E. about 10 m/s.
The following graph shows the position of
an ant on a straight line over time.
Position vs. Time
18
16
Position ( m)
14
12
10
Position
8
6
4
2
0
0
5
10
15
20
Time (s)
10. At which of the following pairs of times was the ant
moving in the same direction?
A. 5 s & 10 s B. 4 s & 12 s C. 2 s & 17 s D. 10 s & 15 s
11. A ball is thrown straight up. At the top of its path its
acceleration is
A.
B.
C.
D.
E.
about 20 m/s2.
0 m/s.
about 50 m/s2.
about 5 m/s2.
about 10 m/s2.
12. Suppose you drop a feather and a hammer at the same
time while standing on the moon, where there is no air.
Which will reach the ground first?
A. Neither - they will both reach the ground at the same
time.
B. The hammer
C. The feather
13. Which of the following would NOT be considered a
projectile?
A. A cannonball thrown through the air
B. A cannonball thrown straight up
C. A cannonball rolling off the edge of a table
D. A cannonball rolling down a slope
E. All of the above are projectiles.
14. At the instant a ball is thrown horizontally with a
large force, an identical ball is dropped from the same
height. Which ball hits the ground first?
A. The dropped ball
B. The horizontally thrown ball
C. Neither. They both hit the ground at the same time.
15. What is the velocity of a cheetah that runs 90 meters
toward a zebra in 3 seconds?
The following graph shows the position of
an ant on a straight line over time.
Position vs. Time
18
16
Position ( m)
14
12
10
Position
8
6
4
2
0
0
5
10
15
20
Time (s)
16. At which of the following pairs of times was the ant in
the same position?
A. 5 s & 13 s B. 8 s & 18 s C. 2 s & 12 s D. 6 s & 20 s
17. How far will you go if you drive at a velocity of 25
meters per second eastward for 30 seconds?
18. True or false?
Average speed is defined as the time it takes for a trip
divided by the distance.
The following graph shows the position of
an ant on a straight line over time.
Position vs. Time
18
16
Position ( m)
14
12
10
Position
8
6
4
2
0
0
5
10
15
20
Time (s)
19. During which of these time periods is the ant
moving slowest?
A. 1 – 6 s B. 6 – 11 C. 11 – 14 s D. 16 – 20 s
20. What is the acceleration of a car that goes from rest
to 25 m/s in 5 seconds?
21. A girl drops a water balloon from the chair lift at the
Georgia National Fair in Perry. Ignoring air friction,
what is the velocity of the balloon 3 seconds after it is
dropped? (The acceleration of earth’s gravity is about
10 m/s2.)
The following graph shows the position of
an ant on a straight line over time.
Position vs. Time
18
16
Position ( m)
14
12
10
Position
8
6
4
2
0
0
5
10
15
20
Time (s)
22. During which of these time periods is the ant not
moving?
A. 1 – 6 s B. 14 – 16 s
C. 11 – 14 s D. 16 – 20 s
position
position
time
time
A
B
23. Which of the two graphs represents an object that is
moving at constant velocity?
24. Create a line graph for position vs. time of a car
shown in the table below. Make position the y axis and
time the x axis. Be sure to label each axis, number each
axis, plot each point, and draw a best fit line.
time (s)
position (m)
1
6
2
12
3
18
4
24
5
30
6
36
7
42
8
48
9
54
10
60