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Question 24Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it.(a) How much work is done by the men in lifting the box?(b) How much work do they do in just holding it?(c) Why do they get tired while holding it? (g=10ms−2) |
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Answer» Question 24 Four men lift a 250 kg box to a height of 1 m and hold it without raising or lowering it. (a) How much work is done by the men in lifting the box? (b) How much work do they do in just holding it? (c) Why do they get tired while holding it? (g=10ms−2) |
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