Levers

• Force multiplier

  • Increase the application of force by making the force arm longer than the resistance arm
• Speed multiplier

  • Maximising lever length at the point of impact/release ensures maximum velocity is achieved
  • Increase movement speed by making the resistance arm longer than the force arm
• First class lever (RAF)

  • The axis is located in the middle, with the force and resistance on either side
  • E.g. heading a soccer ball
• Second class lever (FRA)

  • The axis is located at the end, with the resistance in the middle and force applied at the end
  • E.g. standing up on your tippy toes, doing calf raises
• Third class lever (RFA)

  • The axis is located at one end, with the applications of force in the middle and resistance applied at the opposite end
  • E.g. golfer using longest club, side arm ball throw, lacrosse or ice hockey
• Levers in the human body