A particle is under the influece of a force F=-kx+kx^3/(a^2), where k and a are constants and k is positive. Determine U(x) and discuss the motion. What happens when E=1/4 (k a^2)?(adsbygoogle = window.adsbygoogle || []).push({});

I know F = - grad U, but how do I use this fact to set up the problem?

Can someone help me to get started?

Thanks!

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# Homework Help: Determing U(x) from Force

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