Hooke's Law

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Physical Law

Hooke's Law applies to an ideal spring:

$\mathbf F = -k \mathbf x$


$\mathbf F$ is the force caused by a displacement $\mathbf x$
$k$ is the spring force constant.

The negative sign indicates that the force pulls in the opposite direction to that of the displacement imposed.

The strain is proportional to the stress.

Also see