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# Levers and their classes

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### Levers and their classes

1. 1. Levers and their classes What are levers? Classes of Levers Functions of levers Real life application
2. 2. What are levers? • • • • • • • • A lever is a machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. The word comes from the French lever, "to raise" A lever amplifies an input force to provide a greater output force, which is said to provide leverage An input force is put in order to provide a greater output force, the input force provide leverage. Levers are used to: increase force and to change the direction of motion sometimes we use levers without knowing it. there are levers we use every day.
3. 3. Classes of levers • Class 1: Fulcrum in the middle: the effort is applied on one side of the fulcrum • It uses a fulcrum in between • The closer it is to the load, the more force is applied.
4. 4. • Class 2:resistence is in the middle and the fulcrum is on the other side and force on the opposite side of the fulcrum.
5. 5. • Class 3: Effort in the middle: the resistance is on one side of the effort and the fulcrum is located on the other side.
6. 6. Functions of levers
7. 7. Functions of levers