EXAMPLE 1: THE WORK-ENERGY RELATION
Calculate the power of the frictional force to do work on the grinding disk and its power to do work on the work piece B. Assume the grinding wheel and connection have a total mass of m. What happens to the difference in the power?
(a) Power of friction to do work on the grinding wheel
(b) Power of friction to do work on work piece B
The difference in the power between PA and PB appears in the form of heat that ends up heating the surfaces.