Elasticity

• Inelastic deformation


  Object doesn't return to its original shape and stays deformed
• To keep an object still, more than one force needs to be applied
• Force extension equation


  f = ke
• Spring constant


  Denoted by letter k, measured in newtons per meter, tells how many newtons it would take to stretch the object by one meter
• Types of elasticity


  1. Explain the terms spring constant and Hooke's Law

  2. Look at force extension graphs
• Measuring extension of a spring

  Hang the spring from a solid support, add downward force to the bottom of the spring, measure the change in length as extension
• Objects like a spring, ball, or phone can experience deformation when forces are applied
• When you apply a force to an object, it could cause it to compress, stretch, or bend
• Extension


  Increasing length of a spring when it's stretched
• Force is proportional to extension


  f is proportional to e
• Elastic deformation


  Object returns back to its original shape after the forces have been removed
• Types of deformation

  • Elastic
  • Inelastic
• Higher spring constant means stiffer material as it requires more force to stretch
• When an object changes shape, it is said to be deformed
• At the elastic limit, Hooke's Law no longer applies and the object may not return to its original shape
• Graph of force against extension

  Shows direct proportionality, known as Hooke's Law