**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 = (v_{2} - v_{1})/ Dt |
C. a = (t_{1} - t_{2})/Dv |

B. a = (v _{1} - v_{2})/Dt |
D. a = (t_{2} - t_{1})/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**?

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/s ^{2}**,
how long does it take her to slow down?

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/s ^{2}**. What was the horse's velocity before
accelerating?

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/sat0 sand extends to5.0 m/sat5.0 s.

B. The line is descending from5.0 m/s at 0 sto0 m/sat5.0 s.

C. The line is rising from0 m/sat 0 s to5.0 m/sat5.0 s.

D. The line is vertical from0 m/sat5.0 sto5.0 m/sat5.0 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/sat0 sand extends to5.0 m/sat5.0 s.

B. The line is descending from5.0 m/sat0 sto0 m/sat5.0 s.

C. The line is rising from0 m/sat0 sto5.0 m/sat5.0 s.

D. The line is vertical from0 m/sat5.0 sto5.0 m/sat5.0 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/sat0 sand extends to5.0 m/sat2.0 s.

B. The line is descending from5.0 m/sat0 sto 0 m/s at2.0 s.

C. The line is rising from0 m/sat 0 s to 5.0 m/s at2.0 s.

D. The line is vertical from0 m/sat2.0s to 5.0 m/s at2.0 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**?

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

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

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**?

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**?

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**?

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.

To see the answer sheet for these problems, please click here

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