Forces and Elasticity

• What is the difference between elastic and inelastic deformation?

  Elastic deformation returns to original shape; inelastic deformation does not.
• What happens to an elastic object when the forces acting on it are removed?

  It returns to its original length or shape.
• What is the term used for the changes in shape or length of an elastic material when forces are applied?

  Elastic deformation.
• What occurs when only one force is applied to a stationary object?

  The object moves instead of changing length or shape.
• How do inelastic materials behave when stretched?

  They do not return to their original length.
• How can you calculate the force needed to stretch an elastic object?

  By using the equation: Force = Spring constant × Extension.
• What is the equation to calculate the force needed to stretch an elastic object?

  Force (N) = Spring constant (N/m) × Extension (m).
• What is the process to calculate the force required to extend a spring?

  1. Identify the spring constant (N/m).
  2. Identify the extension (m).
  3. Multiply the spring constant by the extension.
• If the spring constant is 200 N/m and the extension is 0.04 m, what is the force required?

  8 Newtons.
• What type of energy is stored when an elastic object is stretched or compressed?

  Elastic potential energy.
• What is the relationship between work done and elastic potential energy?

  Work done equals elastic potential energy.
• What should you do to learn about elastic potential energy further?

  • Watch the video on the energy topic.
  • Review related questions in the vision workbook.