Unformatted text preview: x cancel, and ( 29 . 2 1 2 1 2 2 mgx l k kx U∆ + = c) An additive constant to the mechanical energy does not change the dependence of the force on , , dx dU x F x= and so the relations expressing Newton’s laws and the resulting equations of motion are unchanged....
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 Energy, Force, Potential Energy, unstretched length

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