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OpenStudy (anonymous):
The figure shown are the speeds of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 64 kg. Determine the force exerted by the chin-up bar on his body at (a) t=0 s(b) t=0.5 s (c) t=1.1 s (d) t=1.6 s
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