12.34: A mass m attached to a light string of length L is
n c8zc88qfn-l;tr1n olocated at an angle θ below the horizontal a
fn88q;crtn n -l8z 1cos shown in 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?