forces & elasticity

• What is the difference between elastic and inelastic deformation?

  Elastic deformation returns to original shape, while inelastic deformation does not.
• How do you calculate the force needed to stretch or compress an object?

  Force = spring constant × extension.
• What happens to an elastic object when the forces acting on it are removed?

  It returns to its original length or shape.
• What is an example of an elastic material?

  A rubber band is an example of an elastic material.
• What do scientists call changes in shape or length due to applied forces in elastic materials?

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

  The object will move rather than change length or shape.
• What is a characteristic of inelastic materials when stretched?

  They do not return to their original length when forces are removed.
• What is a good example of inelastic materials?

  Certain polymers are examples of inelastic materials.
• What is the equation to calculate the force required to extend a spring?

  Force = spring constant × extension.
• If the spring constant is 200 N/m and the extension is 0.04 m, what is the force required to extend the spring?

  The force required is 8 N.
• What is stored in an elastic object when it is stretched or compressed?

  Elastic potential energy is stored in the object.
• What is the relationship between work done and elastic potential energy when an elastic object is deformed?

  The work done is equal to the elastic potential energy.
• What are the key characteristics of elastic materials?

  • Return to original length or shape after forces are removed
  • Undergo elastic deformation when stretched, compressed, or bent
  • Require balanced forces to change shape or length
• What are the key characteristics of inelastic materials?

  • Do not return to original length after forces are removed
  • Undergo inelastic deformation when stretched
  • Examples include certain polymers
• What is the process of calculating force in elastic materials?

  1. Use the equation: Force = spring constant × extension
  2. Substitute values for spring constant and extension
  3. Calculate the force required
• What is the significance of elastic potential energy in elastic objects?

  • Elastic potential energy is stored when an object is deformed
  • Work done on the object is equal to the elastic potential energy
  • Important for understanding energy transfers in elastic materials