Moments

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

  A moment
• How do you calculate moment of a force?

  Moment of force (Nm) = Force x Distance
• What distance measurement is used when calculating a moment?

  The perpendicular distance from the pivot to the line of action of the force
• If an object is in equilibrium, what can be said about the moments acting on the object?

  The clockwise moments are equal to the anticlockwise movements
• How do levers make use of moments?

  They increase the perpendicular distance of the force from the pivot, so decrease the force needed to produce the same moment
• How does lubricating levers/gears improve efficiency?

  There is less resistance; less energy is wasted/dissipated (as heat) overcoming frictional forces