A block of mass `M` is pulled along a horizontal frictionless surface by a rope of mass `m` . Force P is applied at one end of rope. The force which the rope exerts on the block is:

Options

A. `(P)/(M-m)`
B. `(PM)/(M-m)`
C. `(Pm)/(M-m)`
D. `(PM)/(M+m)`

Answer

D

Explanation

`P=(M+m)arArr=(P)/(M+m)`

`T=Ma=(PM)/(M+m)`