Physics equations

• Wave Speed

  Frequency x wavelength
• Efficiency

  Useful energy out/ total energy in
• Work done

  Force x distance moved
• Gravitational potential energy

  Mass x gravitational field strength x height
• Kinetic energy

  1/2 x mass x speed squared
• Density

  Mass/ volume
• Pressure


  Force/ area
• Pressure difference


  Height x density x gravitational field strength
• Momentum

  Mass x velocity
• Input voltage/output voltage

  Primary turns/ secondary turns
• Average speed


  Distance travelled/ time taken
• Acceleration

  Change in velocity/ time taken
• Force


  Mass x acceleration
• Weight

  Mass x gravitational field strength
• Moment

  Force x perpendicular distance from pivot
• Power


  Current x voltage
• Input power

  Output power
• Voltage

  Current x resistance
• Charge


  Current x time