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(a) a spring exerts a force of 13.0n when stretched 1.3m beyond its natural length. assuming that hooke's law applies, how much work was performed in stretching the spring to this length?
enter the exact answer.
(b) a spring exerts a force of 4.4n when stretched 1.1m beyond its natural length. how far beyond its natural length the spring can be stretched with 5.12j of work?
enter the exact answer.
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