The anchor of the U. S.S. Constitution (Old Ironsides) was forged in the 1790s and weighs 5300 pounds. The depth in the harbor where it sits at the Boston Navy Yard averages 40 feet.
(a) How much work is required to raise the anchor from the bottom of the harbor to a point 16 feet above the water, if you neglect the weight of the chain?
(b) If the chain actually weighs 50 pounds per foot, how much work does this add to the task? (Assume the chain also ends up 16 feet above the water.)