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In a forward punch in karate, the fist b...

In a forward punch in karate, the fist begins at rest at the waist and is brought rapidly forward until the arm is fully extended. The speed v (t) of the fist is given in Fig. 2-22 for someone skilled in karate. The vertical scaling is set by `v_(s)=8.0 m//s`. How far has the fist moved at (a) time `t=50` ms and (b) when the speed of the fist is maximum ?

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The correct Answer is:
(a) 0.13 m; (b) 0.50 m
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