Hooke's Law

Physical Law
Hooke's Law applies to an ideal spring:


 * $$\mathbf F = -k \mathbf x$$

where:
 * $$\mathbf F$$ 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.

From dimensional analysis, the dimension of $$k$$ is $$MT^{-2}$$.