Energy

• energy stores

  • Kinetic
  • Thermal
  • Gravitational potential
  • Elastic potential
  • Chemical
  • Magnetic
  • Electrostatic
  • Nuclear
• Non-renewable energy resources will run out
• Renewable energy resources that are replenished
• lubrication reduces the frictional forces, reduces the rate at which work is done against friction. This improves efficiency
• Power is the rage of transfer of energy
• Energy is dissipated meaning the energy is speared out into its surroundings. The wasters energy tends to be thermal / heat