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Fifth Grade Science. Levers. Lever- a stiff bar that rests on a middle support. Parts of a Lever. Load- the weight or the resistance that needs to be overcome. Effort- the force applied to move a load. Lever- stiff bar. Fulcrum- pivot point (fixed).
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Fifth Grade Science Levers
Parts of a Lever Load- the weight or the resistance that needs to be overcome Effort- the force applied to move a load Lever- stiff bar Fulcrum- pivot point (fixed)
Levers can be classified into three different types or classes.
First Class Levers • In a Class 1 lever, the fulcrum is between the effort and the load. EFL LFE
First Class Levers • Examples of common tools (and other items) that use a type 1 lever include:
Second Class Levers • In Class 2 levers, the load is between the fulcrum and the effort. ELF FLE
Second Class Levers Examples of common tools that use a type 2 lever include:
Third Class Levers • In Class 3 levers, the effort is between the fulcrum and the load. LEF FEL
Third Class Levers • Examples of common tools that use a type 3 lever include:
Class 2 Lever!! Effort Fulcrum Load
Class 1 Lever!! Effort Load Fulcrum
Class 3 Lever!! Effort Load Fulcrum