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) -8.9 J
B) -7.3 J
C) -8.1 J
D) -6.6 J
E) -24 J
Correct Answer:

Verified
Correct Answer:
Verified
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