Your Name: _________________________________ Phy203 - Final Exam

Student ID: _________________________________ Chapters 1-12,14

12/12/03

Part 1

(For problems 1 - 9)

An object is moving in one dimension. Its position x is measured and is graphed above as a function of time t.

1. Calculate the displacement of this object from 0 s to 20 s.

a. 10 m

b. 9 m

c. 1 m

d. 37 m

e. 0.45 m

2. Calculate the total distance traveled by this object from 0 s to 6 s.

a. 8 m

b. 4 m

c. 0 m

d. 1.3 m

e. 0.67 m
3. Calculate the average speed of this object from 6 s to 16 s.

a. 1.1 m/s

b. 0.5 m/s

c. 1.9 m/s

d. -1.5 m/s

e. -3.0 m/s

4. Calculate the average velocity of this object from 2 s to 9 s.

a. 4.5 m/s

b. 3.4 m/s

c. -1 m/s

d. -0.14 m/s

e. 0.64 m/s

5. Estimate the instantaneous velocity of this object at 9 s.

a. 0.44 m/s

b. 4 m/s

c. 2 m/s

d. 1 m/s

e. 0.33 m/s

6. Estimate the instantaneous speed of the object at 2 s.

a. 5 m/s

b. 2 m/s

c. 0 m/s

d. 1.5 m/s

e. 2.5 m/s

7. At which of the following times, is the instantaneous velocity NOT zero?

a. 2 s

b. 6 s

c. 12 s

d. 15 s

e. 18 s

8. Calculate the average acceleration of this object from 16 s to 18 s.

a. -3 m/s²

b. -1.5 m/s²

c. 0 m/s²

d. 3 m/s²

e. 1.5 m/s²

9. At which of the following times, is the instantaneous acceleration NOT zero?

a. 3.3 s

b. 6 s

c. 9 s

d. 12 s

e. 16 s
(For problems 10 -12)

An object is moving around a circle of radius 5 m in 2 dimensions at a constant speed.

Its position in X and Y is indicated in the diagram above as a function of time.

10. Calculate the average speed of the object from 0 s to 2 s.

a. 10 m/s

b. 7.9 m/s

c. 5 m/s

d. 0 m/s

e. -5 m/s

11. Calculate the average velocity of the object from 1 s to 3 s.

a. -10 m/s j

b. -7.9 m/s j

c. -5 m/s j

d. 0 m/s j

e. 5 m/s j

12. Calculate the instantaneous acceleration of the object at 2 s.

a. 12.3 m/s² i

b. -12.3 m/s² j

c. 5 m/s² i

d. -5 m/s² j

e. 0 m/s² i