Stretching

• Hooke’s law is that force is direcfly proportional to extension
• A linear force-extension graph means the object obeys hooke’s law
• Elastic behaviour is the ability of a material to return to its original shape after The forces causing deformation have been removed
• Elastic bands don’t obey hooke’s law
• The elastic limit is when it doesn’t go back to the original shape when the forces of deformation have been removed