the conservation and dissipation of energy-P1

• What does "lower wasted = lower input" imply about energy efficiency?


  It suggests that reducing wasted energy leads to a more efficient system
• What does power represent in terms of energy transfer?


  Power is the rate of energy transfer
• Why does a pendulum eventually stop?


  Due to air resistance acting on it
• How can friction be reduced in a mechanical system?


  By using lubrication
• What is the Law of Conservation of Energy?


  Energy cannot be created nor destroyed
• What are the different types of energy mentioned?

  • Gravitational Potential Energy (GPE)
  • Kinetic Energy
  • Elastic Potential Energy (EPE)
• What is the difference between useful energy and wasted energy?


  • Useful energy: Energy transferred to where it is wanted
  • Wasted energy: Energy that isn't useful
• How does friction affect energy in a system?


  Friction causes energy to be wasted
• What happens to energy as it spreads out?


  Energy becomes less useful the more it spreads out