9.75-m ladder with a mass of 23.2 kg lies flat on the ground. Apainter grabs the top end of the ladder and pulls straight upwardwith a force of 245 N. At the instant the top of the ladder leavesthe ground, the ladder experiences an angular acceleration of 1.80rad/s2 about an axis passing through the bottom end ofthe ladder. The ladder's center of gravity lies halfway between thetop and bottom ends.
(a) What is the net torque acting on the ladder?
(b) What is the ladder's moment of inertia?