Chapter 9 Speed and Motion Test A
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. If the Spirit of Australia reaches speeds of 318.67 mph for 0.75 hours (45 minutes), what is the distance it traveled?
a. 239 mi b. 424.9 mi c. 14340.2 mi d. none are correct
2. Sally snail has a speed of 4 cm/min, how long will it take her to travel 65 cm?
a. 260 min b. 16.3 min c. 0.06 min d. none are correct
3. A plane passes over Point A with a velocity of 8000 m/s north. Forty seconds later it passes over Point B at a velocity of 10,000 m/s north. What is the planes’ acceleration from A to B?
a. – 50 m/s/s north b. 200 m/s/s north
c. 50 m/s/s north d. -200 m/s/s north
4. A dog can run as fast as 15 miles per hour for a short distance. If a dog ran at this speed for 6 minutes, or 0.10 of an hour, how far would it run?
a. 90 miles b. 2.5 miles c. 150 miles d. 1.5 miles
5. As coconut falls from a tree it travels a velocity of 19.6 m/s until it hits the ground. It takes 2 seconds before it reaches the ground. What is the coconut’s acceleration?
a. 39.2 m/s/s b. -39.2 m/s/s c. – 9.8 m/s/s d. none are correct
6. A place or object used for comparison to determine if something is in motion is called
a. / a position.b. / a reference point.
c. / a constant.
d. / velocity.
7. Speed equals distance divided by
a. / time.b. / velocity.
c. / size.
d. / motion.
8. When you know both the speed and direction of an object’s motion, you know the
a. / average speed of the object.b. / acceleration of the object.
c. / distance the object has traveled.
d. / velocity of the object.
9. Average speed is
a. / equivalent to velocity.b. / the rate at which an object is moving at a given instant.
c. / the rate at which a slope changes.
d. / the total distance traveled divided by the total time.
10. If you know the distance an object has traveled in a certain amount of time, you can determine
a. / the size of the object.b. / the speed of the object.
c. / the location of the object.
d. / the acceleration of the object.
11. If the speed of an object does NOT change, the object is traveling at a
a. / constant speed.b. / average speed.
c. / increasing speed.
d. / decreasing speed.
12. If a bicyclist travels 30 kilometers in two hours, her average speed is
a. / 30 km/h.b. / 60 km/h.
c. / 15 km/h.
d. / 2 km/h.
13. If an object moves in the same direction and at a constant speed for 4 hours, which of the following is true?
a. / The object’s speed changed during the 4 hours.b. / The object’s velocity did not change.
c. / The object accelerated during the 4 hours.
d. / The object decelerated during the 4 hours.
14. If you know a car traveled 300 kilometers in 3 hours, you can find its
a. / acceleration.b. / direction.
c. / average speed.
d. / velocity.
15. A car travels 85 km in the first hour of a trip. The car continues to travel for 2 more hours and travels 200 km. What was the average speed of the car for the trip?
a. / 39 km/hb. / 95 km/h
c. / 114 km/h
d. / 285 km/h
16. The rate at which velocity changes is called
a. / instantaneous speed.b. / direction.
c. / acceleration.
d. / motion.
17. Which of these is an example of deceleration?
a. / a bird taking off for flightb. / a roller coaster moving down a steep hill
c. / a car approaching a red light
d. / an airplane following a straight flight path
18. To determine the acceleration rate of an object, you must calculate the change in speed during each unit of
a. / velocity.b. / time.
c. / motion.
d. / deceleration.
19. If speed is measured in kilometers per hour and time is measured in hours, the unit of acceleration is
a. / hours.b. / kilometers per hour.
c. / kilometers per hour per hour.
d. / kilometers.
20. Which of the following is the correct equation for acceleration?
a. /b. /
c. /
d. /
21. What kind of line on a distance-versus-time graph indicates that the object is accelerating?
a. / curvedb. / horizontal
c. / diagonal
d. / vertical
22. The energy associated with motion is called
a. / kinetic energy.b. / elastic potential energy.
c. / gravitational potential energy.
d. / nuclear energy.
23. Which of the following has kinetic energy?
a. / a rock poised for a fallb. / an archer’s bow that is drawn back
c. / a rolling bowling ball
d. / a car waiting at a red light
24. Unlike kinetic energy, potential energy is
a. / energy of motion.b. / stored.
c. / conserved.
d. / not measurable.
25. Potential energy that depends on height is called
a. / kinetic energy.b. / gravitational potential energy.
c. / elastic potential energy.
d. / mechanical energy.
26. In a graph of distance versus time, the slope represents
a. / displacement.b. / speed.
c. / acceleration.
d. / potential energy.
27. The rise of a line on a distance-versus-time graph is 400 km and the run is 50 hours. What is the speed of the object represented by this graph?
a. / 2000 km/hb. / 450 km/h
c. / 350 km/h
d. / 8 km/h
True/False- Indicate whether the statement is true by marking A or false by marking B.
28. Motion is measured relative to a reference point.
29. A meter is a place or object used for comparison to determine if something is in motion.
30. The SI unit of velocity is the meter per second per second (m/s/s).
31. A compressed spring has elastic potential energy.
32, 33, 34, and 35. Label the diagram of a person tossing a basketball. Show where there is potential and kinetic energy. Mark “A” for potential energy, “B” for kinetic, “C” for both potential and kinetic, or “D” for neither
Describe how the bus is traveling in the graph. Use the letters to describe each line segment.
Chose either: A. Acceleration B. Deceleration C. Constant Speed D. Stop
36. Line 0-A
37. Line A-B
38. Line B-C
39. Line C-D
40. Line D-E