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I'd guess that you've seen the Wikipedia article on dielectric heating. If so, I think the article is potentially confusing when it says: Temperature is the average kinetic energy (energy of motion) of the atoms or molecules in a material This is true, but in solids the energy is in lattice vibrations. It is kinetic energy in the sense that the ...


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We normally define work something along the lines of "force applied over a distance," but for the case of work done on a rotating object, it would be force applied over an arc-length. So, for some small amount of work $dW$, need to have a force at some distance form the center of rotation (actually a torque), $\tau$, which goes over some small angle, ...



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