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

Question 35

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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