Work done

• The ”work done“ by a force means “energy transferred“ by that force.
• Work done = force x distance moved in direction of force

  W = Fd
• Energy transferred = work done
• If an object does not move, no work is done.
• Power is the amount of energy transferred every second - power is the rate of work done.
• GPE = mgh
• KE = 0.5 m v^2
• Conservation of energy:

  • Energy cannot be created or destroyed, only change form
  • If an object falls, GPE —> KE and GPE = work done
  • If an object is thrown upwards, KE —> GPE and KE = work done