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A force vecF=(-yhati+xhatj)N acts on a p...

A force `vecF=(-yhati+xhatj)N` acts on a particle as it undergoes counterclockwise circular motion in x-y plane in a circle of radius 4 m and with the centre at origin. If the work done by the force when the particle undergoes one complete revolution is (assume x,y are in m) `4pi lambda` joule then calculation `lambda`.

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