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The potential energy of two atoms separa...

The potential energy of two atoms separated by a distance x is give by `U=-A//x^(0)`, where A is a positive constant. What is the force exerted by one atom on another atom ?

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Here, `U=A//x^(6), F=?`
From `F_(x)=-(partial)/(partialx)(U)`
`=-(partial)/(partialx)((-A)/(x^(6)))=A((-6)/(x^(7)))`
`:.` force exerted by one atom on another atom
`=-6A//x^(7)`
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