Hooke's Law

What is Hooke's Law?

Hooke's law states that the extension of a spring is directly proportional to the load applied, provided the limit of proportionality is not exceeded. It is written F = kx, where k is the spring constant, defined as force per unit extension and measured in newtons per metre.

This definition is part of the Motion, Forces and Energy chapter in Cambridge IGCSE Physics.

Concepts related to Hooke's Law

• extension
• limit of proportionality
• elastic strain energy
• load-extension graph