Chapter 6, 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 0.280-kg volleyball approaches a player horizontally with a speed of 15.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? (b) If the player's fist is in contact with the hall for 0.060 0 s, find the magnitude of the average force exerted on the player’s fist.

(a)

To determine
The impulse delivered to the ball by the player.

Explanation

Given info: The mass of the volleyball is 0.280â€‰kg , the speed of the player is 15.0â€‰m/s , and the speed of the ball moves in the opposite direction is 22.0â€‰m/s .

The expression for the impulse delivered to the ball.

I=Î”p . (I)

• Î”p is the change in momentum
• I is the impulse

Rewrite the expression (I) in terms of mass and velocity.

I=m(vfâˆ’vi)

• m is the mass of the ball
• vf is the final velocity of the ball
• vi is the initial velocity of the ball

Substitute 0.280â€‰kg for m, 22

(b)

To determine
The magnitude of the average force exerted on the player’s fist.

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