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by this fÜrce.9, An object of' mass m is tied to a string of length Iand a variable force F is applied on it whichbrings the string gradually at angle θ with theicaf Find the work done by the force F.Im |
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Answer» From work energy theorem, since change in Kinetic energy is zero, the total work done by all forces must be equal to zero. That means, WF+ Wg= 0 WF= –Wg= mgL(1 – cos theta) |
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