Elastic Potential Energy

• What is the first equation related to elasticity mentioned in the video?

  F = ke
• What does the variable K represent in the equation F = ke?

  Spring constant specific to each object
• What does a lower spring constant indicate about an object?

  It is more elastic and easier to stretch
• What does a higher spring constant indicate about an object?

  It is stiffer and harder to stretch
• What is the second equation related to elastic potential energy?

  Elastic potential energy = $\frac{1}{2} ke^2$
• What does the variable E represent in the equation for elastic potential energy?

  Extension of the object
• How is elastic potential energy transferred when a spring is stretched?

  It is transferred to the spring's energy store
• If 100 joules of energy is used to stretch a spring, what happens to that energy?

  It is stored as elastic potential energy
• How do you calculate the extension of a spring if its natural length is 0.6 meters and it stretches to 0.8 meters?

  Subtract 0.6 from 0.8 meters
• What is the spring constant if a force of 14 Newtons stretches a spring by 0.2 meters?

  17 Newtons per meter
• How do you calculate the elastic potential energy of a spring with a spring constant of 70 and an extension of 0.2 meters?

  Use $\frac{1}{2} ke^2$
• What does the gradient of a force vs. extension graph represent?

  The spring constant of the spring
• What does the area under the curve in a force vs. extension graph represent?

  The energy transferred to the spring
• What is the point known as where an object stops obeying Hooke's law?

  Elastic limit or limit of proportionality
• What are the key concepts of elasticity covered in the video?

  • Two equations: F = ke and elastic potential energy = $\frac{1}{2} ke^2$
  • Spring constant (K) indicates elasticity
  • Lower K means more elasticity; higher K means more stiffness
  • Energy transfer during stretching and releasing
  • Graphs of force vs. extension show spring constant and energy