(II) Two blocks, each of mass m, are attached to the ends of 3 massless rod which pivots as shown in Fig. 8-43. Initially the rod is held in the horizontal position and then released.
Calculate the magnitude and direction of the net torque on this system when it is first released.
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There is a counterclockwise torque due to the force of gravity on the left block, and a clockwise torque due to the force of gravity on the right block. By taking counterclockwise as positive, the torque acting on the point of support is given by product of weight of the either block and the distance from the axis to the point of application of the force.