A hiker of mass 58 kg climbs up a mountain through a, Ask an Expert

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A hiker of mass 58 kg climbs up a mountain through a verticaldistance of 950 m. To make the climb, her bodygenerates an extra 4.5 X 10^6 J of energy.

A) How much work does she do in changing her gravitationalpotential energy?

B) What is her efficiency (expressed as a fraction between 0and 1) in doing the work in part (a)?

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