Answer:
The most common type of lever in the human body is the Third Class Lever
Explanation:
For this, we first need to understand lever systems.
First class lever – the fulcrum lies between the effort and the load. For example head and neck during neck extension.
Second class lever – the load lies between the fulcrum and the effort. For example stand on tip toes
Third class lever – the effort lies between the fulcrum and the load. For example bending arms
Refer to the diagram for deeper understanding.
The load lies away from the fulcrum than the effort. There is no mechanical advantage because the effort is greater than the load. However this disadvantage is compensated with a larger movement – a small contraction of the biceps produces a large movement of the forearm. This type of lever system also gives us the advantage of a much greater speed of movement.
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