The force required to compress an imperfect horizontal spring an amount x is given by F = 150x + 12x(adsbygoogle = window.adsbygoogle || []).push({}); ^{3}, where x is in meters and F in newtons. If the spring is compressed 2.0m, what speed will it give to a 3.0 kg ball held against it and then released?

I know how to integrate F(x) to get the work done, and with that I could use the work-energy theorem to find the speed. But do I take the lower limit of the integral as x = 2.0 and the upper limit as x = 0?

But then the integral would be negative and 1/2mv^{2}can't be negative...

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# Homework Help: Compressed spring with work

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