Two blocks of masses `m_(1) = 1 kg` and `m_(2) = 2 kg` are connected by a non-deformend light spring. They are lying on a rough horizontal surface. The coefficient of friction between the blocks and the surface is 0.4. What minimum constant force F has to be applied in horizontal direction to the block of mass `m_(1)` in order to shift the other block? `(g = 10 m//s^(2))`

Options

A. 8 N
B. 15 N
C. 10 N
D. 25 N

Answer

A