Moment

• Moment

  The bigger the force, the longer the memur
• Moment

  1. Force X distance from pivot point

  2. Newton metres
• Moment

  • The moment is the same (balanced) with each square
  • There is no turning
  • The bigger square is closer to the first (centre point)
  • Without the larger square closer to the middle the moment would not be the same
• Overall force = 150N
• Overall force = 50N
• Weight = 20N
• Weight is at the centre point around which turning takes place
• 20N X 1m = 20 Nm
• Moment

  Moment force (N) x distance from pivot (m)
• Using the moments equation

  1. Write the force and the distance on your diagram

  2. Calculate the moment of the force using this information
• Moment of the force

  • 50N x 0.4m = 20Nm
• Moment of the force (Nm) = Force (N) x Distance from pivot (m)
• If the mechanic uses a longer spanner


  The moment would be bigger
• The moment is the product of force times distance
• Moment = Force x Distance (Nm)
• Moment


  The turning effect of a force
• Moment


  • Depends on the distance from the pivot (m)
  • Depends on the force (N)
• Moment

  • A spanner is pushed with a force of 10 N, 30 cm from the pivot. Moment = 10 N x 0.3 m = 3 Nm
• Calculating Moment

  Force (N) x Distance from pivot (m) = Moment (Nm)
• Moment

  • 150 N, 10 cm from pivot. Moment = 150 N x 0.1 m = 15 Nm
• Moment

  • 0.35 N, 30 cm from pivot. Moment = 0.35 N x 0.3 m = 0.105 Nm
• Moment

  • 10 N, 0.5 m from pivot. Moment = 10 N x 0.5 m = 5 Nm