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
B)(-7.3
C)(-8.1
D)(-6.6
E)(-24

Question

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 
B)(-7.3 
C)(-8.1 
D)(-6.6 
E)(-24

Quizplus · Accepted Answer

The Answer of 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 
B)(-7.3 
C)(-8.1 
D)(-6.6 
E)(-24

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