The system shown is in limiting equilibrium. The coefficient of friction for all contact surfaces is 1/4.
(A) tan = 3/8
(B) Tension in the string = (100/3 g sin θ)N
(C) Net frictional force on 80 kg block is (80 g sin θ )N
(D) Force exerted by 20 kg block on 80 kg block is (20 g cosθ)
