Recall from Chapter 4, Example 4-14, that you can use a pulley and ropes lo decrease the force needed to raise a heavy load (see Fig. 6- 37). But for every meter the load is raised, how much rope must be pulled up? Account for this, using energy concepts.
How much rope must be pulled up for every meter the load is raised.
Answer to Problem 11P
Solution: For every one meter, two meters of the rope must be pulled.
Explanation of Solution
The force exerted by the load is twice that of the work done by the pulling action of the rope since the latter passes over the bottom pulley. Assuming there are no dissipative forces, for every unit that the load is raised, twice as much of the rope must be pulled.
Conclusion: For every one meter, two meters of the rope must be pulled.
Chapter 6 Solutions
Physics: Principles with Applications
Additional Science Textbook Solutions
Physics (5th Edition)
University Physics Volume 1
Applied Physics (11th Edition)
Life in the Universe (4th Edition)
An Introduction to Thermal Physics
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON