Q5.13 You are pushing a large crate from the back of a freight elevator to the front as the elevator is moving to the next floor. In which situation is the force you must apply to move the crate the least, and in which is it the greatest: when the elevator is accelerat- ing upward, when it is accelerating downward, or when it is travel- ing at constant speed? Explain.

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4 May 2018

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A 60.0kg crate rests on a level floor in an elevator. Thecoefficients of static and kinetic friction are 0.760 and 0.410,respectively. The elevator is accelerating upward at1.20m/s2

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