JEE Main Physics question
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 [MP PET 2007]
Answer: (D)
Solution
Treating rope + block as one system, a = P/(M+m). The force on the block alone equals Ma = PM/(M+m).