Forms of energy

• Kinetic energy

  • Moving objects have kinetic energy
  • Kinetic energy can be used to do work
• Potential energy

  • Energy that is stored
  • Potential energy can be converted to kinetic energy and vice versa
  • Potential energy exists in many forms
  • Elastic potential energy in an archer's bow
  • An object has gravitational potential energy when it is raised to a certain height above the ground
• Forms of potential energy

  • Elastic potential energy
  • Gravitational potential energy
  • chemical potential energy
• 
  

  Types of energy transfer

  • heat
  • electric current
  • waves(sound/light)
  • w.d by a force
• Gravitational potential energy and work done

  1. To find GPE of an object near the surface of Earth, consider its mass and height above the ground

  2. Gravitational potential energy is defined as work done, GPE = mgh
• Law of conservation of energy:

  Energy cannot be created or destroyed

  Can only change from one form to another

  Total energy before and after a change remains the same
• Types of energy stores

  • kinetic energy
  • potential energy
  • Thermal energy
  • nuclear energy
• Types of potential energy

  • chemical potential energy
  • gravitational potential energy
  • elastic potential energy