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

Question

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 Friction in the system is negligible.

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