Hooke's law is discovered by the physicist Robert Hooke. The Hooke's law spring constant states that the force required to stretch out any elastic object such as string is directly proportional to the extension of the spring. The below given is the Spring constant formula to calculate spring force constant k. Here k represents the constant of proportionality, also known as string constant, F represents force and x states the distance from equilibrium while X0 is spring equilibrium position.
According to Hooke's law, the force exerted by the string is referred as restoring force. Just substitute the values of variables in the spring constant formula and do the operations to get the spring constant.