Answer Happy

**Notice that the unit of length is feet and the unit of weight (force) is pounds. A pound is a unit of force that already includes gravity, so there is no need to multiply by gravity in this problem.** A 80-foot-long chain hangs vertically from a cylinder attached to a winch. Assume there is no friction in the system and that the chain has a density of 4 lb/ft. a. How much work is required to wind the entire chain onto the cylinder using the winch? b. How much work is required to wind the chain onto the cylinder if a 45-lb block is attached to the end of the chain? a. The amount of work required is ft-lb. (Type an integer or a decimal.) b. The amount of work required if a 45-lb block is attached to the end of the chain is ft-lb. (Type an integer or a decimal.)