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? 
Definitions:
Virtual Network
Common type of technology infrastructure, which consists of links that are not wired connections.
Costly Hardware
Expensive physical components of a computer system or other electronic devices.
Operating Systems
The software that manages the hardware and software resources of a computer or mobile device, enabling it to perform basic functions and run applications.
Wide Area Network
A telecommunications network that extends over a large geographic area, connecting multiple smaller networks.
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