February 22, 2017

Homework Help: Calculus

Posted by Mason on Friday, May 2, 2014 at 9:41am.

An electric elevator cable with a motor at the top has a multistrand cable weighing 4.5lb/ft. When the car is at the first floor, 180ft of cable are pulled out, and effectively 0ft 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 stop.

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