(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I need to find the acceleration of an atom, given the potential:

U(r) = ε[(σ/r)^12 - (σ/r)^6]

where r = |x1 - x2|, ε = 1e-20 J, and σ = 3e-10 m.

2. Relevant equations

I know F=-dU/dr and F=ma so

a=(-dU/dr)/m but I think my dU/dr is wrong.

3. The attempt at a solution

dU/dr = (6εσ^6/r^7) - (12εσ^12)/r^13

so F = (12εσ^12)/r^13 - (6εσ^6/r^7)

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# Homework Help: Finding a force from a simple potential

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