Moments

• A force can cause an object to rotate, the turning effect is called its moment
• A Larger force means there is a larger moment
• To get the maximum moment, you need to push it perpendicular (right angles)
• If the total anticlockwise moment is equal to clockwise moment the object is balanced and won’t move
• Levers increase the distance from which the force is applied. This means less force is needed to get the same moment. This means levers make it easier to do work
• Gears transmit rotational effects

  • Their teeth interlock so that turning one causes another to turn, in the opposite direction
  • They are used to transmit the rotational effect of a force from once place to another
  • Different sized gears can be used to change the moment of a force as the distance is different