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A 12-Kg Mass Is Projected Up a Rough Circular Track (Radius

Question 24

Multiple Choice

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? 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? A) −2.7 J B) −8.8 J C) −4.7 J D) −6.7 J E) −19 J


A) −2.7 J
B) −8.8 J
C) −4.7 J
D) −6.7 J
E) −19 J

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