A moving company rigs a pulley system to lift a piano to a fourth floor balcony 44 feet from the ground. The pulley system has 7 ropes with one pulling down and 6 supporting the load and the piano weighs 1200lbs. What is the Ideal MA of this system? Assuming 88% efficiency what is the True MA of this system? True MA, how much force would be required to lift the plano? the piano to the balcony? Using the How much rope would be pulled to lift

A moving company rigs a pulley system to lift a piano to a fourth floor balcony 44 feet from the ground. The pulley system has 7 ropes with one pulling down and 6 supporting the load and the piano weighs 1200lbs. What is the Ideal MA of this system? Assuming 88% efficiency what is the True MA of this system? True MA, how much force would be required to lift the plano? the piano to the balcony? Using the How much rope would be pulled to lift

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.70P: Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at...

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Question

1. A moving company rigs a pulley system to lift a piano to a fourth floor balcony 44 feet from the ground. The pulley system has 7
ropes with one pulling down and 6 supporting the load and the piano weighs 1200lbs. What is the Ideal MA of this
system?
Assuming 88% efficiency what is the True MA of this system?
True MA, how much force would be required to lift the plano?
the piano to the balcony?
Using the
How much rope would be pulled to lift

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