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An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb/ft. When the car is at the first floor, 130 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?

An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb/ft. When the car is at the first floor, 130 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?

University Physics Volume 1
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 70AP: A particle of mass 2.0 kg moves under the influence of the force F(x)=(5x2=7x)N . Suppose a...
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An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb/ft. When the car is at the first floor, 130 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? The amount of work required is (Simplify your answer.) ft-lb.
Transcribed Image Text:An electric elevator with a motor at the top has a multistrand cable weighing 5.5 lb/ft. When the car is at the first floor, 130 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? The amount of work required is (Simplify your answer.) ft-lb.
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