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How much work is done in raising a stone of ma5 kg and relative density 3 lying at bed of a lthrough a height of 5 metre in the lake?[Take g 10 ms 21 |
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Answer» Loss of weight in water = weight in air / specific gravity = 5/3Weight of stone in water = 5-5/3 = 10/3Force = 10/3 x 9.8 = 98/3Work done = 5 x 98/3 = 163.3 |
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