The law of inertia is a fundamental principle in physics, and it is not specifically related to elastic force. The law of inertia is also known as Newton's first law of motion, named after Sir Isaac Newton.
Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will continue moving with a constant velocity, unless acted upon by an external force. In other words, an object will maintain its state of motion (whether at rest or moving in a straight line at a constant speed) unless a force is applied to change that state.
Elastic force, on the other hand, is a force that arises when an elastic material, such as a spring or a rubber band, is stretched or compressed. It is related to Hooke's law, which states that the force exerted by an elastic material is proportional to the displacement or deformation of the material from its equilibrium position.
The law of inertia and the concept of elastic force are distinct and separate principles in physics. The law of inertia describes the tendency of objects to maintain their state of motion, while elastic force pertains specifically to the forces exerted by elastic materials when they are deformed or displaced from their equilibrium positions.