Problem 4 Pulleys are a tool that can change the direction of a tension force without changing its magnitude. A worker has decided to lift a 153kg piano using the aid of a pulley. He has two options: 1) a single pulley or 2) a double-pulley. In both cases he will lower the piano with an acceleration of g/8 downward (that is, 1/8th the acceleration due to gravity). You're going to analyze both situations to determine which is better. Option 1: Single Pulley (left) (a) (b) a. Draw a FBD for the piano. b. Write Newton's 2nd law for the piano. C. Solve for the tension force in the rope. 1313 N Option 2: Double Pulley (right) – this redirects the tension force twice. In drawing your FBD, you may act as if the pulley were part of the piano. а. Draw a FBD for the piano. Check with your instructor before proceeding. b. Write Newton's 2nd law for the piano. c. Solve for the tension force in the rope. 656.3 N

Problem 4 Pulleys are a tool that can change the direction of a tension force without changing its magnitude. A worker has decided to lift a 153kg piano using the aid of a pulley. He has two options: 1) a single pulley or 2) a double-pulley. In both cases he will lower the piano with an acceleration of g/8 downward (that is, 1/8th the acceleration due to gravity). You're going to analyze both situations to determine which is better. Option 1: Single Pulley (left) (a) (b) a. Draw a FBD for the piano. b. Write Newton's 2nd law for the piano. C. Solve for the tension force in the rope. 1313 N Option 2: Double Pulley (right) – this redirects the tension force twice. In drawing your FBD, you may act as if the pulley were part of the piano. а. Draw a FBD for the piano. Check with your instructor before proceeding. b. Write Newton's 2nd law for the piano. c. Solve for the tension force in the rope. 656.3 N

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Energy Of A System

Section: Chapter Questions

Problem 45AP

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