The arm of a crane at a construction site is 20 m long, and it makes an angle of 12° with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces at the base of the arm.
(a) What is the magnitude of the maximum torque the crane can withstand if the maximum load the crane can handle is 738 N?
(b) What is the maximum load for this crane at an angle of 15° with the horizontal?