Elasticity, spring constant, and Hooke’s Law

• What are the different types of elasticity discussed in the video?

  Elastic and inelastic deformation
• 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 solid support?

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

  It increases the spring's length
• What does the solid support exert on the spring?

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

  f is proportional to e
• What does the letter 'k' represent in the equation f = ke?

  The spring constant
• What units is the spring constant measured in?

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

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

  Force and extension are directly proportional
• What is the elastic limit?

  The point where Hooke's Law no longer applies
• What happens after the elastic limit is reached?

  The 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 applied to a spring affect its extension?

  • Force increases extension proportionally
  • Relationship expressed as f = ke
  • Higher spring constant means stiffer spring
• What are the differences between elastic and inelastic deformation?

  • Elastic deformation: returns to original shape
  • Inelastic deformation: retains deformed shape
  • Elastic deformation occurs within elastic limit