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What is the efficiency of a machine in which 5700 J is required to raise a...

What is the efficiency of a machine in which 5700 J is required to raise a 1250N object 1.25 m? Record your answer as a percentage and include units. Round your answer to the nearest whole number.

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Answer #1

Efficiency is equal to ratio of work done to the energy needed. Work done is equal to change in potential energy of the object as it is raised.

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