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A person performs a bench press. The bar’s mass is 50 kg. When this person’s arms...

A person performs a bench press. The bar’s mass is 50 kg. When this person’s arms are extended, the bar is 0.6m above the starting point. What is the magnitude and direction of the work performed by the person to push the bar off his chest to full extension of his arms?

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Answer #1

Work done is given by product of force and displacement.
In this example, the person has to apply a force against the weight force so that he can lift the weight in an upward direction,



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