A block of mass m is connected to another block of mass M by a spring (massless) of spring constant k. The blocks are kept on a smooth horizontal plane. Initially the blocks are at rest and the spring is unstretched. Then a constant force F starts acting on the block of mass M to pull it. Find the force on the block of mass m.

Options

A. `(mF)/(M)`
B. `((M + m) F)/(m)`
C. `(mF)/((m + M))`
D. `(MF)/((m + M))`

Answer

C