# An estimated force-time curve for a baseball struck by a bat is shown in the figure.... An estimated force-time curve for a baseball struck by a bat is shown in the figure. From this curve, determine (a) the impulse delivered to the ball, (b) the average force exerted on the ball FN) F- 18 000 N 20 000 15 000 10 000 5000 t (ms)

Impulse delivered

I = area under Ft curve

I = 0.5* (0.0025 - 0.001)* 18000 = 13.5 N.s

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Force = impulse / t = 13.5/0.0015 = 9000 N

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