College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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q8

A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the mass at point A is 8.4 m/s, and at
point B, it is 5.6 m/s. What is the change in mechanical energy between A and B caused by the force of friction?
в
0.80 m
(A) -2.7 J
B) -8.8 J
C) -4.7 J
(D) -6.7 J
(E) -19 J
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Transcribed Image Text:A 1.2-kg mass is projected up a rough circular track (radius = 0.80 m) as shown. The speed of the mass at point A is 8.4 m/s, and at point B, it is 5.6 m/s. What is the change in mechanical energy between A and B caused by the force of friction? в 0.80 m (A) -2.7 J B) -8.8 J C) -4.7 J (D) -6.7 J (E) -19 J
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