Moments, Levers and Gears

• What is an alternative name for the turning effect of a force?

  A moment
• What is the equation used to calculate the moment of a force?

  Moment of force = Force x Distance
• What are the appropriate units for moment, force, and distance?

  Moment (Nm), Force (N), Distance (m)
• What distance measurement is used when calculating a moment?

  The perpendicular distance from the pivot
• If an object is in equilibrium, what can be said about the moments acting on it?

  The clockwise moments are equal to the anticlockwise moments
• What three parts make up a lever system?

  • Load
  • Effort
  • Pivot
• How can a lever be used as a force multiplier?

  If the distance between effort and pivot is greater
• Give an example of when a lever may be used to multiply a force.

  A wrench with a long handle
• What determines the moment of a gear wheel?

  The size of the wheel
• Describe the moment and speed of a larger gear being driven by a smaller gear.

  The larger wheel rotates slowly but produces a larger moment