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A cheerleader lifts his 22.3 kg partner straight up off the ground a distance of 0.579 m before releasing her. Assume the partner's velocity

A cheerleader lifts his 22.3 kg partner straight up off the ground a distance of 0.579 m before releasing her. Assume the partner's velocity is zero at the beginning and the end of the lift. The acceleration of gravity is 9.8 m/s. If he does this 31 times, how much work has he done? Answer in units of J. Answer in units of J.

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