Two blocks of mass `m_1=10 kg and m_2=20 kg` are placed on a fixed inclined surface making an angle `theta = 37^(@)` with horizontal. One end of a light spring constant `k=100 N//m` if free and other end is connected to a support S rigidly fixed to inclined surface. The coefficient of friction between block of mass `m_1` and inclined plane is `mu_1=0.5` and that between block of mass`m_2` and inclined plane is `mu_2=1`. At time `t=0` both blocks are released at rest from the shown position. (Take `g= 10 m//s^2`)

The maximum force exerted by block of mass `m_2` is

Options

A. zero
B. `40/3 N`
C. `80/3 N`
D. 40 N

Answer

A

Explanation

Maximum force exerted by block of mass `m_1` on block of mass `m_2` will be zero