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In which case work is not done? |
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Answer» ong>Answer: Let us consider some CASES where work is not done: Work is zero if applied FORCE is zero (W=0 if F=0): If a block is moving on a smooth horizontal surface (frictionless), no work will be done. NOTE that the block may have large DISPLACEMENT but no work gets done. Work is zero if Cos θ is zero or θ = Π/2. |
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