Elasticity and Hooke's Law

• What does the term 'spring constant' refer to?

  It measures stiffness of a spring
• What is Hooke's Law?

  Force is proportional to extension
• What happens when a force is applied to an object?

  It can compress, stretch, or bend
• Why is it harder to notice changes in shape for some objects?

  They are less elastic than springs
• What do we call the change in shape of an object?

  Deformation
• What are the two types of deformation?

  Elastic and inelastic deformation
• What is elastic deformation?

  Object returns to original shape
• What is inelastic deformation?

  Object does not return to original shape
• What is extension in the context of springs?

  Increasing length of a spring when stretched
• What force acts on a spring when it is hung from a support?

  The weight of the spring itself
• What happens when a mass is added to a spring?

  It increases the spring's length
• What does the solid support do when a mass is added to the spring?

  Exerts an equal but opposite force upwards
• How is the relationship between force and extension expressed mathematically?

  f is proportional to e
• What does the spring constant 'k' represent?

  Stiffness of the spring
• What is the formula that includes the spring constant?

  f = ke
• What units are used for the spring constant 'k'?

  Newtons per meter
• What does a higher spring constant indicate?

  Stiffer material requiring more force
• What does a graph of force against extension show?

  Direct proportionality between force and extension
• What is the elastic limit?

  Point where Hooke's law no longer applies
• What happens after the elastic limit is reached?

  Object may not return to original shape
• What are the key concepts related to elasticity discussed in the video?

  • Types of elasticity: elastic and inelastic
  • Spring constant (k)
  • Hooke's Law
  • Force-extension relationship
  • Elastic limit
• How does the force-extension relationship apply to springs?

  1. Force applied increases extension
  2. Extension is proportional to force
  3. Hooke's Law applies until elastic limit
  4. Beyond elastic limit, inelastic deformation occurs