Springs

• What is needed to stretch, bend or compress an object?

  More than one force has to be applied
• What is deformation?

  Changing shape
• What is elastic deformation?

  • the object returns to its original shape when the load has been removed
  • elastic band
• What is plastic deformation?

  • object does not return to its original shape when the load has been removed
  • a spring when pulled too far