Forces and elasticity

• What is the difference between elastic and inelastic deformation?

  Elastic deformation returns to original shape
• What can you calculate regarding an object in this lesson?

  The force needed to stretch or compress
• What energy transfers occur when an elastic object is deformed?

  Elastic potential energy is stored
• What are examples of elastic materials mentioned?

  • Slinky
  • Rubber bands
  • Rubber gloves
  • ERaser
  • Playground surface
  • Tennis ball
• What happens to an elastic object when stretching forces are applied?

  It stretches and returns to original length
• What is the key fact about elastic materials?

  They return to original length when forces are removed
• What occurs when squeezing forces are applied to an elastic material?

  It compresses and returns to original length
• What is the term for changes in length or shape of elastic materials?

  Elastic deformation
• What happens if only one force is applied to a stationary object?

  The object moves instead of changing shape
• What is an example of an inelastic material?

  Certain polymers
• What is the result of stretching inelastic materials?

  They do not return to original length
• What does 'e' represent when calculating compression of an elastic object?

  Compression, not extension
• What is the relationship between work done and elastic potential energy?

  Work done equals elastic potential energy
• When is the work done equal to elastic potential energy?

  When the object is not inelastically deformed