A diver stands at rest at the end of a massless diving board as shown in Figure P8.16. (...

A diver stands at rest at the end of a massless diving board as shown in Figure P8.16. (a) If the mass of the diver is 120 kg and the board is 4.0 m long, what is the torque due to gravity on the diving board with a pivot point at the fixed end of the board? (b) According to our convention for positive and negative torques, is the torque on the diving board positive or negative?

(reference figure P8.16)