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Levers
By: Logan, Rowan, Landon, and Alec
What is a Lever?
- A lever is a rigid bar that is free to pivot, rotate, about a fixed point
- The lever pivots on something called a fulcrum
- threes types
- You can calculate the ideal mechanical advantage of a lever by the equation: Distance from fulcrum to input force/Distance from fulcrum to output force
What is a Lever?
First Class Levers
- When the distance from the fulcrum to the input force is greater than the distance from the fulcrum to the output force then they multiply force. that is a first class lever
- Ex. Scissors
First class levers
Second Class levers
- These levers always multiply force but they don't change the direction of the input force
- Ex. Doors, bottle openers
Second Class levers
Third Class Levers
- These Levers multiply distance but don't change the directions of the input force
- Ex. Fishing Poles, Shovels