STANDARD Physics Equilibrium of Forces MCQ Question
Block A of weight 100 N rests on a frictionless inclined plane of slope angle 30° as shown in the figure. A flexible cord attached to A passes over a frictionless pulley and is connected to block B of weight W. Find the weight W for which the system is in equilibrium.
25 N
50 N
75 N
100 N
Correct Answer
Detailed Explanation
As the system is in equilibrium, T = W and T = mgsin30°. From these equations, we get W = mgsin30° = (100 N) × 1/2 = 50 N.
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