12.34: A mass m attached to a light string of leng
u2ha etpl (o l gg+;wc.gw,j)5th L is located at an angle θ below the horizontal as shown in
owguce,2 .( +ajgpwl)hlgt5; the figure to the right. The mass then is released from rest. Calculated from an axis perpendicular to the plane of the page through the pivot, which one of the following choices represents the magnitude of the torque produced by the gravitational force acting on the mass at this instant?