Formulas

• Hookes law


  Spring constant x extension
• Speed


  Distance/time
• AV. Speed

  Total distance / total time
• Acceleration 


  U - V / T
• Resultant force

  Mass x acceleration
• Weight 


  Mass x gravity
• Pressure


  Force / area
• Moment

  Force x distance
• Efficiency

  Useful output / total input
• Workdone

  Force x distance
• Power


  Work done / time
• GPE

  Mass x gravity x height
• Kinetic energy

  I/2 x mass x velocity2
• Density

  Mass / volume
• Gradient

  Rise / run
• Distance from a speed time graph

  Area under the graph