A 100%-Efficient Engine Is Being Used to Raise a 89-Kg

question 135

Short Answer

A 100%-efficient engine is being used to raise a 89-kg crate vertically upward at a steady
rate. If the power output of the engine is 1620 W, how long does it take the engine to lift
the crate a vertical distance of 18.7 m? Friction in the system is negligible.

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