Name: ______

Constant Acceleration Study Guide. Use this guide to help you prepare for the unit test.

Modified True/False

Indicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the sentence or statement true.

____ 1. The rate of change of the speed of an object is called its acceleration. ______

Multiple Choice

Identify the letter of the choice that best completes the statement or answers the question.

____ 2. If an object has an acceleration of 0 m/s every second, which of the following may happen?

a. / The object increases its speed.
b. / The object reverses its direction.
c. / The object moves at a constant speed.
d. / None of the above.

____ 3. When an object is decreasing speed we can say it is

a. / Energizing
b. / Motionless
c. / Decelerating
d. / Stopped

____ 4. Units of measurement used to label a quantity of acceleration are:

a. / m2/sec.
b. / sec2/m.
c. / m/sec.
d. / m/sec/sec.

____ 5. Acceleration is:

a. / The distance between two dots.
b. / The distance divided by time.
c. / The rate of change in the speed of an object
d. / Mr. Goett and Dr. Bitko running to the finish line of a race.

____ 6. Ana glances at the speedometer on her car as she begins to roll downhill. It indicates she is traveling at 10 miles per hour when she initially looks at it and 25 miles per hour 5 seconds later. Her acceleration is:

a. / 3 mph/sec.
b. / 6 mph/sec.
c. / 12 mph/sec.
d. / 24 mph/sec.

____ 7. The slope of a velocity versus time graph represents:

a. / distance traveled.
b. / speed
c. / Time
d. / s acceleration..

___ 8. The slope of the line of a graph is calculated by:

a. / dividing the run by the rise.
b. / multiplying the run by the rise.
c. / dividing the rise by the run.
d. / None of the above.

Completion

Complete each sentence or statement.

9. The amount of change in the speed of an object divided by the amount of time it took to change the speed represents ______.

10. The ratio of the “rise” (vertical change) to the “run” (horizontal change) of the best-fit line on a graph represents the ______of the graph.

Short Answer

11.  An object is moving with constant speed. Describe two ways to change this motion that would cause the object to accelerate. Give an example of each.

______

______

12.  Give an example of an object with a positive acceleration.

______

______

13.  Give an example of an object with a negative acceleration.

______

In each of the motion diagrams below, determine the value and direction of the acceleration. Add the squiggly acceleration answer to show your answer.

2 m/s 6 m/s 10m/s

Value of the acceleration: ______

Add an acceleration arrow.

15. 

-8 m/s -6 m/s -4 m/s -2 m/s

Value of the acceleration: ______

Add an acceleration arrow..

16. 

-5 m/s -10 m/s -15 m/s

Value of the acceleration: ______

Add an acceleration arrow.

.

17. 

15 m/s 10 m/s 5 m/s

Value of the acceleration: ______

Add an acceleration arrow.

.

18.
acceleration = ______
Description of motion:
Every second, the velocity changes by 10 m/s.
Time (s) / Velocity (m/s)
0 / 40
1
2
3
4
5
6
/ 19.
acceleration = ______
Time (s) / Velocity (m/s)
0
1
2 / 25
3 / 20
4 / 15
5
6
Description of motion:
20.
acceleration = - 10 m/s/s
Time (s) / Velocity (m/s)
0
1
2 / 10
3
4
5
6
Description of motion: / 21.
acceleration = 4 m/s/s
Time (s) / Velocity (m/s)
0 / 20
1
2
3
4
5
6
Description of motion:


Convert the dot diagrams to positions. Add velocity arrows. Determine the velocities

Find the pattern

22.

Time (s) / Position (m)
0 / 0
1
2
3
4
5
Arrow / Velocity (m/s)
1
2
3
4
5
/ Find the pattern in the velocity table. The velocity goes ______by ______each ______.

23.

Time (s) / Position (m)
0 / 0
1 / 1
2 / 4
3
4
5
Arrow / Velocity (m/s)
1 / 1
2 / 3
3
4
5
/ Find the pattern in the velocity table. The velocity goes ______by ______each ______.


24. On a good day, a yugo can accelerate from 0 km/hr to 60 km/hr in 8 seconds. What is the acceleration of this car? Give your answer in units of kilometers per hour/sec.

Looking For / Solution-(Show relationships, substitutions, solutions, and units)
Given
Formula

25. A sprinter increases her speed from 0 to 6 m/s in 0.5 second. What is her acceleration?

Looking For / Solution-(Show relationships, substitutions, solutions, and units)
Given
Formula

26. A soccer player executing a corner kick causes the ball to change its velocity from 0 to 30 m/s in 0.4 seconds. What is the ball’s acceleration?

Looking For / Solution-(Show relationships, substitutions, solutions, and units)
Given
formula

gP1.2.4rvw_AccelerationHOME_14JM_csd.doc