Levers

• Mechanical advantage

  Where the force that comes out is greater than the force put in
• Two parts to a lever

  A bar

  A fulcrum (pivot)
• Effort


  The force that is the input
• Load 


  The force that is the output
• Fulcrum


  Position of the pivot is very important
• First order lever


  Mechanical advantage will increase if the load is closer to the fulcrum and the effort is further away

  
• Second order lever


  Effort is at the opposite end to the fulcrum and the load is in between

  
• Third order lever


  Load is at the opposite end to the fulcrum and the effort is in the middle