Two blocks of masses `m_(1)` and `m_(2)` are connected through a massless inextensible string .A block of mass `m_(1)` is placed at the fixed rigid inclined surface while the block of mass `m_(2)` hanging at the other end of the string which is passing through a fixed massless frictionless pulley shown in figure The coefficient of static friction between the block and the inclined plane is `0.8` The system of masses `m_(1)` and `m_(2)` released from rest

Options

A. The tension in the string is `20 N` after releasing the system
B. The contact force by the inclined surface on the block in along normal to the inclined surface
C. The magnitude of contact force by the inclined surface on the `m_(1)` is `20 sqrt(3) N`
D. None of these

Answer

a,b,c

Explanation

Here `m_(1)g sin 30^(@) = m_(2)g = 20 N` so there is so tendency motion in any direction
Hence , there is no friction on `m_(1)` contact force will be only normal force