A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m . If a force P is applied at the free end of the rope, the force exerted by the rope on the block is

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Since the displacement for both block and rope is same so, the acceleration must be same for both ⇒ p = ( m + M ) a ⇒ a = m + M P ​ T = M ⋅ a = m + M PM ​

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