question_answer

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

Answer:

                If a is the acceleration produced, then \[P=(M+m)a\]   or \[a=\frac{P}{M+m}\] Force exerted by the rope on the block \[F=Ma=\frac{MP}{M+m}.\]