Formula

• Kinetic energy(J)


  1/2 x mass(kg) x speed^2(m/s)
• Gravitational Potential Energy(J)


  mass(kg) x gravitational field strength(N/kg) x height(m)
• Power(W)


  Work done(J) / Time (s)
• Efficiency

  Useful output energy transfer / Total input energy transfer
• Charge Flow (Columbous, C)


  Current (A) x Time (s)

  
  

  Q = It
• Potential Difference (V)


  Current (A) x Resistance (Ω)

  
  

  V=IR
• Energy transferred (J)

  Power (W) x Time (s)
• Power (W)


  Potential difference (V) x Current (A)
• Density (kg/m^3)


  mass (kg) / volume (m^3)
• Weight (N)


  Mass (kg) x Gravitational Field Strength (N/kg)
• Work done (J)


  Force (N) x Distance (m) (along the line of action of the force)
• Force applied to a spring

  Spring constatnt (N/m) x Extension (m)
• Moment of a force (Nm)

  Force (N) x Distance (m)
• Pressure (Pa)


  Force (N) / area (m^2)
• Distance travalled (m)


  speed (m/s) x time (s)
• Acceleration (m/s^2)


  Change in velocity (m/s) / time (s)
• Resultant force (N)


  Mass (kg) x Acceleration (m/s^2)
• Momentum (kg m/s)


  mass (kg) x velocity (m/s)
• Power (W)


  Energy transferred (J) / Time (s)
• efficiency

  useful power output / total power input
• Wave speed (m/s)


  Frequency (Hz) x Wavelength (m)
• Power (W) 


  Potential difference (V) x Current (A)
• Power (W)


  Current^2 (A) x Resistance (Ω)
• Energy Transferred (J)


  Charge flow (C) x Potential difference (V)