An athlete at the gym holds a 1.0 kilogram steel ball in his hand. His arm is 62 centimeter long and has a mass of 4.0 kilogram. Find the magnitude of the torque about his shoulder if he holds his arm in each of the following ways?
(a) Straight out to his side, parallel to the floor
Nm
(b) Straight, but 45 degree below horizontal
Nm