A linear restoring force refers to a force that acts on an object in the opposite direction of its displacement, and the magnitude of this force is directly proportional to the displacement. It obeys Hooke's Law.
Related terms
Oscillation: The repetitive motion of an object around an equilibrium position.
Displacement: The distance and direction from the equilibrium position.
Elasticity: The property of a material that allows it to regain its original shape after being deformed by an external force.