What is the definition of spring force?

Spring force is the force exerted by a compressed or stretched spring, described by Hooke's Law, which states that the force is proportional to the displacement from its equilibrium position. Mathematically, it is expressed as ( F = -kx ), where ( F ) is the spring force, ( k ) is the spring constant, and ( x ) is the displacement. The negative sign indicates that the force acts in the opposite direction of the displacement, seeking to restore the spring to its original shape.