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NEET 2015 Physics question

PhysicsSystems of Particles and Rotational MotionNEET 2015

A rod of weight is supported by two parallel knife edges A and B and is in equilibrium in a horizontal position. The knives are at a distance from each other. The centre of mass of the rod is at distance from A. The normal reaction on A is :-

Answer: (3)

Solution

For equilibrium, the net torque about any point is zero and the net force is zero. Taking torques about the knife edge B (distance from A, with the weight acting at distance from B): $ d = W(d -

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Question ID VK-091815