2.8

• Elastic


  Able to return to original shape after force is removed
• Inelastic


  Unable to return to original shape after force is removed
• Deformation


  Change in shape of an object
• Limit of proportionality


  Point beyond which an object will not return to its original length when force is removed
• Extension


  Increase in length of an object
• Mass


  Quantity of matter in an object
• Weight


  Gravitational force acting on an object
• Elasticity


  Property of an object that determines if it can return to its original shape after a force is removed
• Hooke's Law


  The extension of a spring is directly proportional to the force applied to the spring, provided its limit of proportionality is not exceeded
• Spring Constant


  Measure of the stiffness of a spring
• Hooks Law states the extension of a spring is directly proportional to the force applied to the spring, provided its limit of proportionality is not exceeded
• The linear (straight) line of the graph shows that force is proportional to the extension of the spring
• This linear part is known as the elastic region and is following Hooke's Law
• Elastic deformation


  Occurs when an object returns to its original shape when the load/force has been removed
• Inelastic deformation


  Occurs when an object does not return to its original shape when the load/force has been removed