Two children, with masses 31 kg (on the left) and 45 kg (on the right), sit at opposite ends of a 3.2 m long seesaw with mass 23 kg, with the fulcrum at its midpoint.
Part A: With the seesaw horizontal, find the net torque on the seesaw.
Part B: With the seesaw horizontal, find its angular acceleration. Please include the appropriate units.