Stopping a Baseball: Work, Force and Calculation

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Homework Statement

Suppose a .146 kg baseball is traveling at 40 m/s.

a.How much work must be done on the ball to stop it? answer 116.8 J

b. if it is brought to rest in 2 cm what average force must act on the ball?

Homework Equations

KE=(1/2)mv^2

The Attempt at a Solution

w=Favg(.02m)
116.8=Favg (.02m)
Favg=116.8(N/m)/.02(m)

5840N/1000=5.48 kN

 

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