- #1

Mowgli

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## Homework Statement

A 0.165kg softball is pitched to you at 20.0m/s. You hit the ball back along the same path, and at the same speed. If the bat was in contact with the ball for 9.90x10^-3 seconds,

a.) what was the average force the bat exerted on the ball?

b.) Could this force lift a 70.0kg person?

## Homework Equations

I believe the equation to use is

mass/change in time x (final velocity + initial velocity)

## The Attempt at a Solution

a.)

(.165kg (20 + 20 m/s)) / 9.90 x 10^-3

= .165(40) / .0099

= 666.7 N

= 6.70 x 10^3 N

b.)

How do I factor in a 70kg person? Do I use 70(40)/.0099 ?