STANDARD Physics Equilibrium of Rigid Bodies MCQ Question
A uniform rod of length 1 m and mass 4 kg is supported on two knife-edges placed 10 cm from each end. A 60 N weight is suspended at 30 cm from one end. The reactions at the knife edges is
60 N, 40 N
75 N, 25 N
65 N, 35 N
55 N, 45 N
Correct Answer
Detailed Explanation
The rod is in equilibrium, so the sum of moments about any point is zero. Taking moments about one of the knife-edges and solving for the reactions gives the correct values of 65 N and 35 N.
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