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

Question 6

Multiple Choice

A 1.2-kg mass is projected down a rough circular track (radius = 2.0 m) as shown. The speed of the mass at point A is 3.2 m/s, and at point B, it is 6.0 m/s. What is the change in mechanical energy done on the system between A and B by the force of friction? A 1.2-kg mass is projected down a rough circular track (radius = 2.0 m) as shown. The speed of the mass at point A is 3.2 m/s, and at point B, it is 6.0 m/s. What is the change in mechanical energy done on the system between A and B by the force of friction? A) −8.9 J B) −7.3 J C) −8.1 J D) −6.6 J E) −24 J


A) −8.9 J
B) −7.3 J
C) −8.1 J
D) −6.6 J
E) −24 J

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