to which the load is attached weigh a total of 20.0 lb. An 840-lb load is to be raised 12.0 ft.

(a) What is the minimum applied force F that can lift the load?

(b) How much work must be done against gravity in lifting the 840-lb load 12.0 ft?

(c) Through what distance must the applied force be exerted to lift the load 12.0 ft?

(d) How much work must be done by the applied force F to accomplish this task?