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:
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Lever - Class Type Description Examples Illustration First Class Fulcrum is between Effort and Load Teeter-Totter
See-saw
Second Class Load is between Effort and Fulcrum Wheelbarrow 
Third Class Effort is between Fulcrum and Load Pliers 
