Test Exercises for Chapter 2, for Fun and Profit
by
Cynthia D'Souza

Name ________________________ Date __________________
Class _______________________

Select the best answer for each question below.

1. What is acceleration?
 A. an increase in velocity C. a change in the direction of velocity B. a decrease in velocity D. any change in velocity

2 What is the mathematical equation for acceleration?
 A. a = (v2 - v1)/ Dt C. a = (t1 - t2)/Dv B. a = (v1 - v2)/Dt D. a = (t2 - t1)/Dv

3. A car accelerates at a constant rate from 55 km/h [E] to 105 km/h [E] in 5.0 s. What is its acceleration?
 A. 5 (km/h)/s [E] C. 5 (km/h)/s [W] B. 10 (km/h)/s [E] D. 10 (km/h)/s [W]

4. A water skier starting from rest reaches a velocity of 8.4 m/s in 2.1 s. What is her average acceleration?

A.    2.0 m/s2     B. 3.0 m/s2     C. 4.0 m/s2     D. 5.0 m/s2

5 . A student driving on the interstate slows down from a velocity of 88 km/h to a velocity of 73 km/h in order to exit onto a two-lane highway. If her acceleration is -6.0 m/s2, how long does it take her to slow down?

A. 2.5 s     B. 5.0 s    C. 9.0 s     D. 4.5 s

6. Heading into the home stretch, a jockey accelerates his horse to 13.5 m/s in 2.5 s at an average acceleration of 2.0 m/s2. What was the horse's velocity before accelerating?

A. -18.5 m/s     B. 18.5 m/s      C. 5.4 m/s     D. 8.5 m/s

7. The motion of objects whose velocity is constantly changing is best represented by
 A. a position-time graph. C. a velocity-displacement graph B. a position-displacement graph D. a velocity-time graph.

8. On a velocity-time graph, which property of a straight line should you calculate to find an object's acceleration?
 A. the x-intercept C. the y-intercept B. the slope D. the area

9. On a velocity-time graph. what does a straight line always represent?
 A. constant displacement C. uniform acceleration B. constant velocity D. constant speed

10. A cyclist accelerates uniformly from rest to 5.0 m/s in 5.0 s. Describe the straight line representing the motion of the cyclist on a velocity-time graph.

A. The line is horizontal from 5.0 m/s at 0 s and extends to 5.0 m/s at 5.0 s.
B. The line is descending from 5.0 m/s at 0 s to 0 m/s at 5.0 s.
C. The line is rising from 0 m/s at 0 s to 5.0 m/s at 5.0 s.
D. The line is vertical from 0 m/s at 5.0 s to 5.0 m/s at 5.0 s.

11. A cyclist is travelling at a uniform velocity of 5.0 m/s for 5.0 s. Describe the straight line representing the motion of the cyclist on a velocity-time graph.

A. The line is horizontal from 5.0 m/s at 0 s and extends to 5.0 m/s at 5.0 s.
B. The line is descending from 5.0 m/s at 0 s to 0 m/s at 5.0 s.
C. The line is rising from 0 m/s at 0 s to 5.0 m/s at 5.0 s.
D. The line is vertical from 0 m/s at 5.0 s to 5.0 m/s at 5.0 s.

12. A cyclist accelerates uniformly from 5.0 m/s to rest in 2.0 s. Describe the straight line representing the motion of the cyclist on a velocity-time graph.

A. The line is horizontal from 5.0 m/s at 0 s and extends to 5.0 m/s at 2.0 s.
B. The line is descending from 5.0 m/s at 0 s to 0 m/s at 2.0 s.
C. The line is rising from 0 m/s at 0 s to 5.0 m/s at 2.0 s.
D. The line is vertical from 0 m/s at 2.0 s to 5.0 m/s at 2.0 s.

13. USE THE ABOVE GRAPH TO ANSWER THIS QUESTION AND THE NEXT 2 QUESTIONS. The above velocity-time graph represents the motion of a dog chasing a cat. What is the dog's acceleration during interval A---from 0 s to 5.0 s?

A. 5.0 m/s2     B. 0.5 m/s2     C. 1.0 m/s2      D. 2.5 m/s2

14. What is the dog's total displacement during intervals A and B, from 0 sec to 7.0 sec?

A. 25.0 m     B. 35.0 m     C. 12.5 m     D. 22.5 m

15. What is the dog's acceleration during interval E, from 12.0 s to 15.0 s?

A. -1.3 m/s2      B. 1.3 m/s2      C. -2.0 m/s2      D. 4.0 m/s2

16. How do do you find the displacement of a moving object from a velocity-time graph?

A. Find the slope of each straight line of the graph and add them together.
B. Find the length of each straight line of the graph and add them together.
C. Find the area under the graph.
D. Find the product of the slope of each line and the area under the graph.

17. A straight line on a velocity-time graph begins at 10.0 m/s at 0 s and extends horizontally to 10 m/s at 10.0 s. What is the displacement of the object during the interval from 0 s to 10.0 s?

A. 0.0 m     B. 1.0 m     C. 10.0 m     D. 100.0 m

18. A straight line on a velocity-time graph begins at 0 m/s at 0 s and rises uniformly to 10 m/s at 10 s. What is the displacement of the object during the interval 0 s to 10.0 s?

A 0.0 m     B. 5.0 m     C. 50.0 m     D. 100.0 m

19. A straight line on a velocity-time graph begins at 10.0 m/s at 0 s and descends uniformly to 0 m/s at 10.0s. What is the displacement of the object during the interval 0 s to 10.0 s?

A. 0.0 m      B. 5.0 m    C. 50.0 m     D. 100.0 m

20. How do you find the average acceleration for a given interval of an object whose motion is represented by a curve instead of a straight line on a velocity-time graph?

A. Average acceleration is equal to the length of the line joining the two points on the curve.
B. Average acceleration is equal to the slope of the line joining the two points on the curve.
C. Average acceleration is equal to the area under the line joining the two points on the curve.
D. Average acceleration is equal to the area under the line joining the two points on the curve divided by the slope of the same line.