Concept explainers
To explain: Changes in the mechanical energy of a book when it is pushed across a table at constant speed.
Explanation of Solution
Introduction:
Thesum totalof kinetic energy and potential energy is called mechanical energy.
When the book is at rest, the book possesses potential energy. As the book comes into motion due to the push, potential energy is converted to kinetic energy. The decrease in potential energy is overcome by the increase in kinetic energy. The sum total of the potential and kinetic energy (mechanical energy) remains constant at any point.
Conclusion:
The mechanical energy of a book remains constant when it is pushed across a table at a constant speed.
Chapter 4 Solutions
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