pendulum

• What is meant by the conservation of energy?

  Energy can be transferred, stored, or dissipated, but cannot be created or destroyed
• What is gravitational potential energy?

  Gravitational potential energy is the energy stored due to an object's position above the ground
• What is kinetic energy?

  Kinetic energy is the energy stored in a moving object
• What is elastic potential energy?

  Elastic potential energy is the energy stored in a stretched spring
• What is thermal energy?

  Thermal energy is the energy stored due to an object's temperature
• What is a system in physics?

  A system is an object or a group of objects
• What is a closed system?

  A closed system is one where no energy can enter or leave
• What happens to gravitational potential energy as a pendulum swings?

  It is transferred to kinetic energy as the pendulum swings down
• When does a pendulum have maximum kinetic energy?

  A pendulum has maximum kinetic energy at the bottom of the swing
• What happens to kinetic energy as the pendulum swings back up?

  Kinetic energy is transferred back to gravitational potential energy
• What is the problem with the pendulum model regarding energy transfer?

  The model does not consider friction affecting energy transfer
• What effect does friction have on the pendulum's energy?

  Friction causes energy to be transferred to thermal energy stores
• What happens to the thermal energy stores due to friction?

  The fixed point and air around the pendulum gradually get warmer
• What does it mean when energy is said to be dissipated?

  It means the energy has been wasted and is less useful
• What happens to the pendulum as energy is dissipated?

  The pendulum gradually swings with less energy and will eventually stop
• How can unwanted energy transfers in a pendulum be reduced?

  By reducing friction, such as using lubricant or removing air particles
• What are the key concepts related to energy in this video?

  • Conservation of energy
  • Energy transfer within a system
  • Energy dissipation
• What are the forms of energy discussed in the video?

  • Kinetic energy
  • Gravitational potential energy
  • Elastic potential energy
  • Thermal energy
• What is the significance of the law of conservation of energy?

  • Energy can be transferred, stored, or dissipated
  • Energy cannot be created or destroyed
• What are the energy transfers in a pendulum's motion?

  1. Gravitational potential energy at the top
  2. Kinetic energy at the bottom
  3. Transfer back to gravitational potential energy as it swings up