Moments

• What is a moment in physics?

  A moment is the turning effect of a force
• When do moments occur?

  When forces cause objects to rotate about a pivot
• How is the moment of a force calculated?

  Moment (N m) = Force (N) × distance (m)

  
• What is the SI unit for moment?

  Newton metres (N m)
• What other unit can be used for moment?

  Newton centimetres (N cm)
• Why might the force not always be perpendicular to the distance?

  Forces can act at various angles
• How does the placement of a door handle affect its operation?

  It maximizes distance for a greater moment
• What does the principle of moments state?

  Sum of clockwise moments equals anticlockwise moments

  
• What is required for a system to be in equilibrium?

  Clockwise moments must equal anticlockwise moments
• What should you do if forces are not given in a diagram?

  Draw all forces on the object in the diagram
• Why is it important to identify perpendicular forces?

  Only they provide a turning effect
• What does the diagram of a balanced beam show?

  Forces supplying clockwise and anticlockwise moments

  
• What should you ensure regarding distances in moment calculations?

  All distances must be in the same units
• What is crucial when considering forces in a moment problem?

  Correctly identify clockwise and anticlockwise forces