Answer: From Pillar to Post. Starting from a pillar, you

Chapter 2, Problem 4E

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QUESTION:

 Problem 4E

From Pillar to Post. Starting from a pillar, you run 200 m east (the + x-direction) at an average speed of 5.0 m/s and then run 280 m west at an average speed of 4.0 m/s to a post. Calculate (a) your average speed from pillar to post and (b) your average velocity from pillar to post.

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QUESTION:

 Problem 4E

From Pillar to Post. Starting from a pillar, you run 200 m east (the + x-direction) at an average speed of 5.0 m/s and then run 280 m west at an average speed of 4.0 m/s to a post. Calculate (a) your average speed from pillar to post and (b) your average velocity from pillar to post.

ANSWER:

Step 1 of 2

The time taken to move 200 m is

 time=distance/speed

        =200/5

        =40 s

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