Name:    Motion Test

1.

To specify the position of an object, you need to know
 A. its motion. B. a reference point. C. its speed. D. a unit of measurement.

2.

A person on a moving train sees a car that appears to be stopped. A person outside the train sees both the car and the train moving. This example shows
 A. a unit of measurement. B. changing speed. C. relative motion. D. measurement of distance.

3.

Which tells you how quickly an object changes position?
 A. direction B. relative motion C. speed D. observation

4.

To find the speed of an object in motion, you need to measure
 A. time and direction. B. distance and direction. C. time and velocity. D. distance and time.

5.

One example of a vector is
 A. velocity. B. speed. C. distance. D. position.

6.

A flat, or horizontal, line on a distance-time graph means that the speed is
 A. increasing. B. decreasing. C. higher than average. D. zero.

7.

Motion is a change in
 A. position over time. B. speed over time. C. velocity over time. D. acceleration over time.

8.

Elena is riding her bicycle. She begins pedaling harder. What do you predict will happen?
 A. Her velocity will decrease. B. Her acceleration will decrease. C. Her speed will increase. D. Her position will not change.

9.

Speed in a specific direction is
 A. acceleration. B. distance. C. position. D. velocity.

10.

Which statement is TRUE of momentum?
 A. The momentum of an object is the product of mass times acceleration. B. Momentum is a measure of mass in motion. C. Momentum is another name for inertia. D. The unit for momentum is the kilogram-meter per newton.

11.

Sara walked north at 100 m/s. Han had a different velocity but the same speed. He could have walked
 A. north at 200 m/s B. south at 50 m/s C. west at 100 m/s D. north at 100 m/s

12.

Jess drives at a steady velocity. Her acceleration is
 A. equal to zero. B. in the same direction as her motion. C. opposite to her motion. D. at a right angle to her motion.

13.

On a velocity-time graph, a line that is slanted down from left to right shows
 A. negative acceleration. B. positive acceleration. C. zero acceleration. D. steady acceleration.

14.

Drew watches a car that appears to be moving forward. Which of the following could be true?
 A. Drew is in another car moving backward. B. The other car is moving backward relative to Drew. C. Drew is in a car moving forward relative to the other car. D. The other car is moving sideways with respect to Drew.

Use the graph below to answer the questions 15 - 17. 15.

What is the average speed of the object traveling?
 A. 0 m/s B. 0.6 m/s C. 1.5 m/s D. 6.0 m/s

16.

What happens to the object between the 30 - 40 second interval?
 A. the object stops B. the object slows down C. the object speeds up D. the object changes direction

17.

When is the object’s speed the greatest?
 A. between the 0 - 10 second interval B. between the 20 - 30 second interval C. between the 30 - 40 second interval D. between the  50 - 60 second interval

18.

If momentum is conserved, then the total momentum after a collision is equal to
 A. the total momentum before the collision. B. the total force before the collision. C. the momentum of the more massive object. D. the momentum of the faster object.

19.

Which is an example of zero acceleration?
 A. a school bus coming to a stop B. an ice hockey player turning around C. a person walking on a treadmill at a steady rate D. an airplane speeding up along a runway

20.

Melanie is accelerating as she skates on the ice. However, the speed at which she is skating has not changed. A possible explanation for this is that Melanie
 A. is skating in a wide circle. B. is skating in a straight line. C. has reached the top speed at which she can skate. D. has stopped skating and is now standing still.

21.

Roger observed an airplane flying overhead. He measured its speed and noted that it moved from north to south. Roger determined the plane's
 A. acceleration B. distance C. position D. velocity

22.

On a roller coaster, the cars first climb a hill at a decreasing speed. Then the cars speed up as they go down the hill, before coasting at a steady speed on a straight track. Finally, the cars slow down as the ride ends. The cars have zero acceleration while
 A. climbing the hill. B. descending the hill. C. coasting on the straight track. D. near the end of the track.

Use the table below to answer questions 23 and 24. 23.

Both Car A and Car B have the same rate of acceleration during the 40 - 60 second interval.  What is their rate of acceleration during this period?
 A. -0.25 m/s² B. -0.5 m/s² C. 0.25 m/s² D. 0.5 m/s²

24.

What is Car A’s acceleration during the 60 - 80 second interval?
 A. -0.25 m/s² B. -0.5 m/s² C. 0.25 m/s² D. 0.5 m/s²

25.

A small SUV that has a mass of 1,486 kg travels east, at a velocity of 35 m/s?  What is the vehicle’s momentum?
 A. 0 kg·m/s B. 0.2 kg·m/s C. 42.5 kg·m/s D. 52,010 kg·m/s