Levers & Machines

The animation below shows a teeter-totter - this is an example of a first cass lever
Levers are simple machines that are designed to enhance our ability to to work more efficiently and with less effort..
  • Levers are often called "Multipliers of Strength". 
  • Many tools and machines make use of levers. 
  • This makes work easier and often saves time and energy and improves efficiency.There are three classes of levers:
  • Lever - Class Type Description Examples Illustration
    First Class Fulcrum is between Effort and Load Teeter-Totter

    Second Class Load is between Effort and Fulcrum Wheelbarrow

    Third Class Effort is between Fulcrum and Load Pliers