A commuter backs her car out of her garage with a constant acceleration of 1.9 m/s2. Assume that her initial motion is in the positive direction. How long does it take her to reach a speed of 2.35 m/s in seconds?    If she then brakes to a stop in 0.65 s, what is her acceleration in meters per square second?

College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 64AP: To pass a physical education class at a university, a student must run 1.0 mi in 12 min. After...
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 A commuter backs her car out of her garage with a constant acceleration of 1.9 m/s2. Assume that her initial motion is in the positive direction.

How long does it take her to reach a speed of 2.35 m/s in seconds? 

 

If she then brakes to a stop in 0.65 s, what is her acceleration in meters per square second?

Expert Solution
Step 1 :Introduction

According to the Newton's laws of motion , the final velocity of an object is calculated by using the formula v=u+at  , where is the initial velocity , is the acceleration and is the time taken.

 

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