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 how much force is needed to stretch a spring by one meter
• What is Hooke's Law?

  It states that force is proportional to extension
• What happens when a force is applied to an object?

  • The object can compress, stretch, or bend.
  • This is most easily observed with springs.
  • Other objects like balls or phones are less elastic.
• What is meant by deformation of an object?

  It refers to a change in shape due to applied forces
• What are the two types of deformation?

  Elastic and inelastic deformation
• What is elastic deformation?


  It is when an object returns to its original shape after forces are removed
• What is inelastic deformation?


  It is when an object does not return to its original shape after forces are removed
• What is extension in the context of springs?

  It is the increase in length of a spring when it is stretched
• How does the weight of a mass affect a spring?

  The weight pulls on the spring, increasing its length and causing extension
• What is the natural length of a spring?

  It is the length of the spring when no forces are acting on it
• What does the spring constant (k) indicate?

  It indicates how many newtons are required to stretch the spring by one meter
• If a spring has a spring constant of $k =$$200 \text{ N/m}$, how much force is needed to stretch it by $0.5 \text{ m}$?


  $F =$$k \cdot e =$$200 \text{ N/m} \cdot 0.5 \text{ m} =$$100 \text{ N}$
• What does a force-extension graph show?


  It shows the relationship between force applied and the extension of the spring
• What does it mean if a force-extension graph is a straight line passing through the origin?

  It indicates that force and extension are directly proportional
• What is the elastic limit?

  It is the point beyond which Hooke's Law no longer applies
• What happens to an object beyond its elastic limit?

  The object may undergo inelastic deformation and not return to its original shape
• What are the key concepts related to force and extension in springs?

  • Force is proportional to extension: $F \propto e$
  • Hooke's Law: $F =$$k \cdot e$
  • Spring constant (k) measured in N/m
  • Extension (e) measured in meters