Question

An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb divided by ft. When the car is at the first​ floor, 110 ft of cable are paid​ out, and effectively 0 ft are out when the car is at the top floor. How much work does the motor do just lifting the cable when it takes the car from the first floor to the​ top?

Answer 1

33275 lb.ft.

Step-by-step explanation:

Length of cable = 110 ft

Weight density of multistranf cable = 5.5 lb/ft

Weight of cable to be filled = 5.5(110-x)

Attached is the remaining part of the solution,