5.3

• What is the relationship between the force applied and the extension of an elastic object?


  The extension is directly proportional to the force applied, provided that the limit of proportionality is not exceeded.
• What is meant by inelastic (plastic) deformation?


  It is a deformation which results in the object being permanently stretched.
• What happens to an object during inelastic deformation when the force is removed?


  The object doesn’t return to its original shape when the force is removed.
• What is the equation relating force, spring constant, and extension?


  Force = Spring Constant x Extension
• What are the appropriate units for force, spring constant, and extension in the equation?

  Force (N), Spring Constant (N/m), Extension (m)
• What type of energy is stored in a spring when it is stretched?

  Elastic potential energy.
• What can extension be replaced with in the equation for spring force?


  Compression.
• What is the relationship between force and extension in elastic materials?


  • Extension is directly proportional to the force applied.
  • This holds true until the limit of proportionality is exceeded.
• What are the characteristics of inelastic deformation?


  • Results in permanent stretching of the object.
  • The object does not return to its original shape after the force is removed.
• What is the equation for force in relation to spring constant and extension?

  • Force = Spring Constant x Extension
  • Units: Force (N), Spring Constant (N/m), Extension (m)
• What type of energy is associated with a stretched spring?


  • Elastic potential energy is stored in a stretched spring.
• What can be substituted for extension in the spring force equation?


  • Extension can be replaced with compression in the equation for spring force.