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A block of mass m is placed on a plank of mass M and given...

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A block of mass m is placed on a plank of mass M and given velocity V Friction between plank and ground is zero The coefficient of friction between the block and plank is and its value is such that block becomes stationary wit respect to plank before it reaches the other end Then m the work done by friction on the block is negative the work done by friction on the plank is positive the net work done by friction is negative net work done by the friction is zero Vo M

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