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**Chapters 1 and 2, January 28, 2004**

Partial credit will be LIBERAL, provided that you show your work!

Use back if necessary!

Name: ______________________ Social Security Number ______________________

**1.**

(5 points)

Multiply 7.132

m by 3.6

10

-3

, taking into account significant figures.

**2.**

**(5 points) CONCEPTUAL QUESTION **

The velocity of an object and the acceleration of an object are both vectors. Is it necessary that they both be in the same direction? Give a brief example to justify your answer.

**3.**

(20 points)

At time t = 0 the brakes are applied to a car at the origin which is initially traveling at

35.0 m/s along the positive x -axis. This causes the car to slow down at a constant acceleration of

**–1.6 m/s 2 .**

**a.**

**How long after the brakes are applied does it take the car to stop? b.**

**What distance does the car go between the time the brakes are applied until it stops? c.**

**How far has the car moved after the brakes have been applied for 12 s ? d.**

What is the car’s velocity

9 s after the brakes are applied?