Levers

• What is the lever system ?

  Joints of our skeleton system not only allows movement, they can aslo act as levers
• What is the fulcrum ?

  Fixed point / pivot
• What is effort ?

  Point where the force / effort applied
• What is load ?

  Point where the weight / resistance is coming from
• What is the load arm ?

  Distance between the fulcrum and the load

  Longer = more speed generated
• What is the effort arm ?

  Distance between the fulcrum and the load

  Longer = more mechanical advantage
• What is the first class lever ?

  Located in the neck

  Doing a header in football
• What is the second class lever ?

  Located in the ball of the foot

  Calf raises

  Mechanical advantage
• What is the third class lever ?

  Located in the elbow

  Bicep curl during flexion
• What is mechanical disadvantage ?

  Resistance arm is greater than effort arm

  Longer the resistance arm = greater speed / range of movement
• What is mechanical advantage ?

  Efficiency of the lever system

  Longer effort arm better efficiency
• What is moment of force / torque ?

  Force applied outside of the centre of mass