12.34: A mass m attached to a light string of length L is located at an
yyrv)mtbvq-2fb.1 a 8 angle θ below the horizontal as shown
)vb-aqytrb8.yv2 1 mf 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?