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Re: Why work before energy in texts



"John S. Denker" wrote:

I stand by my assertion: Defining work in terms of potential energy
would be a blunder. Defining potential energy in terms of work
would be an even bigger blunder.

YES, work is defined as a dot product. But

PEgrv==work done against a weight (or -work by weight).

Why is this a "bigger blunder"? We all know that a zero
reference level must first be declared, arbitrarily, for any
kind of potential energy.
Ludwik Kowalski