Name:    Practice Test - Chapter 12

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

When an object’s distance from another object is changing,
 a. it is in motion. b. it is moving at constant speed. c. it has a high velocity. d. it is accelerating.

2.

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.

3.

Speed equals distance divided by
 a. time. b. velocity. c. size. d. motion.

4.

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.

5.

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.

6.

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.

7.

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.

8.

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.

9.

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.

10.

If you know a car traveled 300 kilometers in 3 hours, you can find its
 a. acceleration. b. direction. c. average speed. d. velocity.

11.

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/h b. 95 km/h c. 115 km/h d. 285 km/h

12.

In a graph showing speed versus time, a straight line shows the acceleration is
 a. decreasing. b. increasing. c. changing. d. constant.

13.

What kind of line on a distance-versus-time graph indicates that the object is accelerating?
 a. curved b. horizontal c. diagonal d. vertical

14.

In a graph of distance versus time, the slope represents
 a. displacement. b. speed. c. acceleration. d. potential energy.

15.

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/h b. 450 km/h c. 350 km/h d. 8 km/h