Chapter 2, Problem 4P

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

Chapter
Section

### College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

# A football player runs from his own goal line to the opposing team’s goal line, returning to the fifty-yard line, all in 18.0 s. Calculate (a) his average speed, and (b) the magnitude of his average velocity.

(a)

To determine
The average speed of the player.

Explanation

Given info: The length of the ground is 100Â yards , the total path length of the player is 150â€‰yards , and the elapsed time is 18.0â€‰s .

Explanation:

The average speed is given by the formula,

s=dÎ”t

Here,

s is the average speed.

d is the path length.

Î”t is the time elapsed.

Substitute 150â€‰yards for d and 18

(b)

To determine
The average velocity of the player.

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