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The potential energy of a body is given by $U=A-B x^2$ (where $x$ is the displacement). The magnitude of force acting on the particle is
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The correct answer is:
proportional to $x$
$U=A-B x^2$
$F=-\frac{d U}{d v}=2 B x$
$F \propto x$
$F=-\frac{d U}{d v}=2 B x$
$F \propto x$
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