Question: A certain amount of work is required to stretch a spring from its equilibrium position. (a) If twice the work is performed on the spring,

A certain amount of work is required to stretch a spring from its equilibrium position.
(a) If twice the work is performed on the spring, the spring will stretch more by a factor of (1) √2 (2) 2, (3) 1√2 (4) 1/2. Why?
(b) If 100 J of work is done to pull a spring 1.0 cm, what work is required to stretch it 3.0 cm?

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