Which of the following states the law of conservation of mechanical energy? a. Mechanical energy in a system remains constant if only nonconservative forces act on the object. b. Mechanical energy in a system changes if only nonconservative forces act on the object. c. Mechanical energy in a system changes if only conservative forces act on the object. d. Mechanical energy in a system remains constant if only conservative forces act on the object.

Glencoe Physics: Principles and Problems, Student Edition
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Chapter11: Energy And Its Conservation
Section: Chapter Questions
Problem 47A
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Which of the following states the law of conservation of mechanical energy?


a. Mechanical energy in a system remains constant if only nonconservative forces act on the object.


b. Mechanical energy in a system changes if only nonconservative forces act on the object.


c. Mechanical energy in a system changes if only conservative forces act on the object.


d. Mechanical energy in a system remains constant if only conservative forces act on the object.

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