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1 To determine the coefficient of friction between a rough surface and a block the...

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1 To determine the coefficient of friction between a rough surface and a block the surface is kept inclined at 45 and the block is released from rest The block takes a time t in moving a distance d The rough surface is then replaced by a smooth surface and the same experiment is repeated The block now takes a time t 2 in moving down the same distance d The coefficient of friction is WB JEE 2014

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