Answers to Practice Test

Name

Date Pd

UNIT II: Test - v1

For each of the following graphs in questions 1-4:
a. Describe, using a clear, complete sentence, how the motion of object 2 differs from the motion of object 1. Explain how you know.
b. Sketch the graph of velocity vs time for object 1 and object 2. (label clearly)
c. In the space provided, draw motion maps for object 1 and object 2.
1.


Object 2 is going faster than object 1. The v-t line for object 2 should be a horizontal line above the x-axis, the v-t line for object 1 should be a horizontal line between the x-axis and the line for 2. The motion map spacing for object 2 should be further apart than object 1
2.
Object 2 is going the same speed as object 1. The v-t line for object 2 should be a horizontal line above the x-axis, the v-t line for object 1 should be the same as object 2. The motion map spacing for object 2 should be the same as object 1, but object 1 starts at the origin, and object 2 starts to the right of object 1

3. Object 1 is going faster than object 2, and object 2 is walking towards the origin. The v-t line for object 2 should be a horizontal line below the x-axis, the v-t line for object 1 should be a horizontal line above the x-axis. The motion map spacing for object 1 should be further apart than object 2. Object 1 starts at the origin and moves right. Object 2 starts on the right side and moves left.

4.
Object 2 is not moving, and object 1 is moving away from the origin.. The v-t line for object 2 should be a horizontal line on the x-axis, the v-t line for object 1 should be a horizontal line above the x-axis. The motion map spacing for object 2 should be dots on that are not moving, starting at a point to the right of the origin, and the dots for 1 are moving away from the origin to the right.

5. DONE IN CLASS

6. DONE IN CLASS

7. Consider the position vs time graph for Flipper below
a) Determine Flipper's average speed. Show your work.

The slope of the line is change in y/change in x = 30 m/6 s = 5 m/s

b) Mathematically model the relationship between position and time.

Y=5x +0

c) What will Flipper's position be at 8.0 s? Show how you got your answer.

Y = 5*8+0 = 40 m


8. DONE in CLASS

9. DONE in CLASS