Question

Type of lever and
Lever application to a human body

Answer 1

All three types are found in the body, but most levers in the human body are third class.

A first-class lever has the axis (fulcrum) located between the weight (resistance) and the force (figure 1.21a). ...

In a second-class lever, the weight (resistance) is located between the axis (fulcrum) and the force (figure 1.22a).

Answer 2

Types ⏩⏩⬇️⬇️

There are three types of levers: first class, second class and third class. The difference between the three classes depends on where the force is, where the fulcrum is and where the load is. In a first class lever, the fulcrum is located between the input force and output force.

Applications ⏩⏩⬇️⬇️

Bones, ligaments, and muscles are the structures that form levers in the body to create human movement. In simple terms, a joint (where two or more bones join together) forms the axis (or fulcrum), and the muscles crossing the joint apply the force to move a weight or resistance.