forces and elasticity

• Elastic material


  Material that will return to its original length or shape when the forces acting on it are removed
• Elastic deformation


  • Changes in length or shape of an elastic material that are reversible when the forces are removed
• Inelastic material


  Material that does not return to its original length when the forces acting on it are removed
• Inelastic deformation


  Changes in length or shape of an inelastic material that are not reversible when the forces are removed
• Calculating force to stretch an elastic object

  Force (N) = Spring constant (N/m) x Extension (m)
• Stretching or compressing an elastic object

  Stores elastic potential energy
• Work done = Elastic potential energy (if object is not inelastically deformed)
• Elastic potential energy has already been covered in the energy topic
• There will be questions on forces and elasticity in the revision workbook