Forces may change the shape of an object.
An object, such as a spring, stores elastic potential energy when stretched or squashed.
When an object, such as a spring, is stretched, the increased length is called its extension.
Hooke's law: The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.
The equation for Hooke’s Law is:
F = ke
- F is the force in newtons (N)
- k is the 'spring constant' in newtons per metre (N/m)
- e is the extension in metres (m)
- This equation holds as long as the limit of proportionality is not exceeded.
|F = ke||F = k x e|
|k = ||k = F ÷ e|
|e = ||e = F ÷ k|