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3 A rod of mass M and l ree to rotate in a vertical plane about an axis through O, as shown in the figure. The axis is normai the the paper. Three masses M, M, and attached to the With the rod in a horizontal position, the system is released from rest. 2M (a) Find the net torque on the rod about the axis of rotation immediately after the system is released. (b) In which direction will the rod begin to rotate? When the system is released, find the initial angular acceleration of the system. (d) Find the initial linear accelerations of the three masses M, M and 2M (e) Find the angular acceleration of the system, when the rod has rotated by 45°. (f Find the angular acceleration of the system, when the rod is vertical.
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(o) The toave ot the yatem tb) erom Past ta) the toqe has positive s so, 2t divected in counter clockie divection.

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