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First Class Lever
First-Class Lever – A lever where the fulcrum is between the effort and the load, like a seesaw (e.g., neck extension).
Lever
A lever is a rigid structure that rotates around a fixed point called the fulcrum. Levers are used to move a load (resistance) by applying an effort (force). The relative positions of the fulcrum, load, and effort determine the type of lever and its mechanical advantage or disadvantage.
Mechanical Advantage
The ratio between effort and load that determines a lever's efficiency
Second-Class Lever
Second-Class Lever – A lever where the load is between the fulcrum and the effort, providing mechanical advantage (e.g., calf raise).
Third-Class Lever
Third-Class Lever – A lever where the effort is between the fulcrum and the load, allowing greater speed and range of motion (e.g., bicep curl).