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Re: the definition of 'work'
Facinating responses guys thanks.
If we take a steel gallow frame and hang a 10 kg weight from a cable is the frame doing work?
I am assuming the term work means "to expend energy".
It's sort of like looking at a steel bar standing on it's end and asking is it expending energy to sustain it's rigidity?
I tend to think that the answer is that the energy expended is also conserved with in the bar system. [at an atomic level] that the forces within the bar generate the energy and absorb the energy in doing that generation. a cycling of energy so to speak.
it is an interesting question though, as to how to correctly assess the energy situation of our rock in a river, I must admit.
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