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5 An unruly demonstrator lifts a stone of mass 200 from the ground and throws...

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5 An unruly demonstrator lifts a stone of mass 200 from the ground and throws it at his opponent At the time of projection the stone is 150 cm above the ground and has a speed of 3 00 m s Calculate the work done by the demonstrator during the process If it takes one second for the demonstrator to lift the stone and throw what horsepower does he use

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