Levers

• 1st class lever:

  • fulcrum in the middle
  • load and effort down
• example of first class lever is heading a football
• 2nd class lever:

  • load in the middle
  • fulcrum on the left
  • effort below facing up
• example of 2nd class lever is pushing off when running (ankle)
• 3rd class lever:

  • fulcrum on the left
  • effort in the middle facing up
  • load facing down on the right
• an example of the 3rd class lever is a bicep curl (elbow)
• mechanical advantage is the ability to lift a large weight with relatively little effort
• 2nd class lever has mechanical advantage