Concept explainers
(a)
The potential energy of the rock-Earth system relative to the base of the cliff.
(a)
Answer to Problem 65A
The potential energy of the rock-Earth system relative to the base of the cliff is
Explanation of Solution
Given:
The mass of the rock is
The height of the cliff is
Formula used:
The expression for the potential energy is,
Here,
Calculation:
Consider the acceleration due to gravity as
The potential energy of the rock-Earth system relative to the base of the cliff is
Conclusion:
Thus, the potential energy of the rock-Earth system relative to the base of the cliff is
(b)
The kinetic energy just before it strikes the ground.
(b)
Answer to Problem 65A
The kinetic energy just before it strikes the ground is
Explanation of Solution
Given:
The mass of the rock is
The height of the cliff is
Calculation:
From part (a), the potential energy of the rock-Earth system relative to the base of the cliff is
Consider the initial potential energy for the system
The kinetic energy just before it strikes the ground is,
Conclusion:
Thus, the kinetic energy just before it strikes the ground is
(c)
The speed of the rock as it hits the ground.
(c)
Answer to Problem 65A
The speed of the rock as it hits the ground is
Explanation of Solution
Given:
The mass of the rock is
The height of the cliff is
Formula used:
The expression for the kinetic energy as follows:
Here,
Calculation:
From part (b), the kinetic energy just before it strikes the ground is
The speed of the rock is,
Conclusion:
Thus, the speed of the rock as it hits the ground is
Chapter 11 Solutions
Glencoe Physics: Principles and Problems, Student Edition
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
Physics: Principles with Applications
University Physics Volume 1
College Physics: A Strategic Approach (4th Edition)
University Physics Volume 2
Lecture- Tutorials for Introductory Astronomy
- 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