Equations

• Work done

  Force x distance
• Kinetic energy


  0.5 x mass x speed^2
• GPE

  mass x gravitational field strength x height
• Power

  Energy transferred/time take
• Power


  Work done/time taken
• Efficiency

  Useful output/total input
• Efficiency

  Useful power output/total power input
• Wave speed

  Frequency x wavelength
• Charge flow


  Current x time
• PD

  current x resistance
• Power


  PD x current
• Power


  Current^2 x resistance
• Energy transferred 


  Power x time
• Energy transferred

  Charge flow x PD
• Energy transferred 


  charge flow x PD
• Density

  Mass/volume