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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 11 - Rotational Mechanics > A uniform rod of length l and mass m is free to rotate in a vertical plane about A. The rod initially in horizontal position is released. The initial angular acceleration of the rod is (Moment of inertia of rod about A is 3/ml^2.)

A uniform rod of length l and mass m is free to rotate in a vertical plane about A. The rod initially in horizontal position is released. The initial angular acceleration of the rod is (Moment of inertia of rod about A is 3/ml^2.)

The instantaneous angular position of a point on a rotating wheel is given by the equation Q(t)=2t^3 − 6t^2. The torque on the wheel becomes zero at :