A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. A force Facts at the free end of the rope. The force which the rope exerts on the block is
`(F.M)/(m + M)`
`(F.M)/(M - m)`
`(F.m)/(M - m)`
`(F.m)/(M + m)`
I think there's a problem in the question. what is 'facts'?