Suppose a 100-foot-long cable is dangling from the roof over the edge of a tall building. Each 1 foot segment of the cable weighs 2 pounds. Calculate the amount of work done when reeling in the first...

Extracted text: Suppose a 100-foot-long cable is dangling from the roof over the edge of a tall building. Each 1 foot segment of the cable weighs 2 pounds. Calculate the amount of work done when reeling in the first 30 feet of the cable. You do not have to simplify your final answer.