Differential Equation - EcademicTube Video Solutions

A heavy rope, 50 ft long, weighs 0.5 lb/ft, and hangs over the edge of a building 120 ft high. (a)How much work is done in pulling the rope to the top of the building? (b)How much work is done in pulling half the rope to the top of the building?

https://www.youtube.com/watch?v=UZUN46zR8Ko&t=162s