Physics Form 4: Chapter 2 - Hooke's Law

• Elasticity is the ability of a material to return to its original shape/length when the stretching force or the compressing force is no longer acting on it.
•  Hooke’s law states that the force applied is proportional to the extension of spring,  provided the elastic limit is not exceeded.

Gradient = spring constant 

Area under the graph = elastic potential energy

• Spring constant quantifies the stiffness of a spring.
• Steeper gradient of graph F against x, extension has a stiffer spring.
• Spring A is stiffer than spring B.