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Q. The loaded cab of an elevator has a mass of 3.0 103 kg and moves 237 m up the shaft in 23 s at constant speed. At what average rate does the force from the cable do work on the cab?

Q. A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 15 {rm m}/{rm s} when the hand is 2.0 {rm m} above the ground.

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