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pavneet (0)

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Olaaa!! Perrrfect answer. 0  [0 rates]

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A solid sphere of mass M and radius r is lying on a rough horizontal plane.a constant force F=4Mg acts vertically at point P such that OP makes 60' with horizontal(where O is centre of sphere).find minimum value of coeffecient of friction (u) so that the sphere starts pure rolling
 
a)  4/7          b)3/7            c)2/7           d)2/5
    
 

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