Question: A spring with a spring constant of 3200N/m is initially stretched until the elastic potential energy of the spring is 1.44 J. (U = 0

A spring with a spring constant of 3200N/m is initially stretched until the elastic potential energy of the spring is 1.44 J. (U = 0 for the relaxed spring.) What is ∆U it the initial stretch is changed to?
(a) A stretch of 2.0 cm,
(b) A compression of 2.0 cm, and
(c) A compression of 4.0 cm?

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