Name:    Motion Practice Test

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

1.

Motion is a change in ____.
 a. time b. speed c. velocity d. position

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.

A person walks 1 mile every day for exercise, leaving her front porch at 9:00 am. and returning to her front porch at 9:25 am. What is the total displacement of her daily walk?
 a. 1 mile b. 0 c. 25 minutes d. none of the above

4.

A passenger in the rear seat of a car moving at a steady speed is at rest relative to
 a. the side of the road. c. the front seat of the car. b. a pedestrian on the corner ahead. d. the wheels of the car.

5.

You can show the motion of an object on a line graph in which you plot distance against
 a. velocity. b. time. c. speed. d. direction.

6.

If you ride your bicycle down a straight road for 500 m then turn around and ride back, your distance is ____ your displacement.
 a. greater than c. less than b. equal to d. can’t determine

7.

The speed you read on a speedometer is ____.
 a. instantaneous speed c. average speed b. constant speed d. velocity

8.

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

9.

On a graph showing distance versus time, a horizontal line represents an object that is
 a. moving at a constant speed. c. decreasing its speed. b. increasing its speed. d. not moving at all.

10.

In graphing motion, the steepness of the slope depends on
 a. how quickly or slowly the object is moving. b. how far the object has moved. c. when the object began moving. d. the direction the object is moving.

11.

3 m/s north is an example of a(n) ____.
 a. speed b. velocity c. position d. acceleration

12.

A merry-go-round horse moves at a constant speed but at a changing ____.
 a. velocity b. balanced force c. inertia d. unbalanced force

13.

Acceleration is rate of change of ____ over a unit of time.
 a. position b. time c. speed d. force

14.

Changing direction is an example of a kind of
 a. acceleration. b. speed. c. velocity. d. constant rate.

15.

A feather will fall through the air more slowly than a brick because of ____.
 a. air resistance b. gravity c. inertia d. momentum

16.

If you know a car traveled 100 miles in 2 hours, you can find its
 a. acceleration. b. direction. c. average speed. d. velocity.

17.

A train that travels 100 kilometers in 4 hours is traveling at what average speed?
 a. 50 km/h b. 100 km/h c. 2 km/h d. 25 km/h

18.

The moon accelerates because it is
 a. in a vacuum in space. b. continuously changing direction. c. a very large sphere. d. constantly increasing its speed of orbit.

19.

An object that is accelerating may be
 a. slowing down. c. changing direction. b. gaining speed. d. all of the above

20.

If the speed of an object does NOT change, the object is traveling at a(n)
 a. constant speed. c. increasing speed. b. average speed. d. decreasing speed.

21.

A horizontal line on a speed vs.time graph shows ____ acceleration.
 a. positive b. negative c. changing d. zero

22.

If velocity is measured in kilometers per hour and time is measured in hours, the unit of acceleration is
 a. hours. c. kilometers per hour per hour. b. kilometers per hour. d. kilometers.

23.

Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 1 s. What is your acceleration?
 a. 2 m/s2 b. 5 m/s2 c. 4 m/s2 d. 3 m/s2

24.

Which of these is an example of deceleration?
 a. a bird taking off for flight b. a baseball released by a pitcher c. a car approaching a red light d. an airplane following a straight flight path

25.

A distance-time graph indicates that an object moves 50 m in 4 s and then remains at rest for 1 s. What is the average speed of the object?
 a. 10 m/s b. 25 m/s c. 50 m/s d. 13 m/s

26.

In physical science, a push or a pull is called a(n)
 a. force. b. acceleration. c. inertia. d. motion.

27.

The SI unit of force is the
 a. joule. b. kilogram. c. meter. d. newton.

28.

When an unbalanced force acts on an object,
 a. the object’s motion does not change. c. the weight of the object decreases. b. the object accelerates. d. the inertia of the object increases.

29.

What happens when two forces act in the same direction?
 a. They cancel each other out. b. The stronger one prevails. c. They add together. d. Their sum divided by two is the total force.

30.

The force that one surface exerts on another when the two rub against each other is called
 a. friction. b. acceleration. c. inertia. d. gravity.

31.

As you push a cereal box across a tabletop, the sliding friction acting on the cereal box
 a. acts in the direction of motion. b. equals the weight of the box. c. is usually greater than static friction. d. acts in the direction opposite of motion.

32.

When two equal forces act on the same object in opposite directions, the net force is
 a. smaller than either force. b. equal to each of the forces. c. zero. d. greater than either force.

33.

What kind of friction occurs as a fish swims through water?
 a. fluid b. rolling c. sliding d. static

34.

Which of the following is an example of increasing friction intentionally?
 a. waxing skis c. throwing sand on an icy driveway b. adding grease to gears on a bike d. oiling a squeaky door

35.

Which of the following is an example of rolling friction?
 a. your shoes on a sidewalk as you walk c. a boat on the water as it sails b. bike tires on the road as you ride d. two hands rubbing together