What characterizes a class 1 lever?

A class 1 lever is characterized by the axis of rotation being positioned between the effort and the resistance. In this type of lever system, effort is applied on one side of the axis, while the resistance (or load) is located on the opposite side.

This configuration allows a class 1 lever to effectively balance and amplify force. A common example is a seesaw, where the pivot point (the axis) is located in the middle, and the effort and load can be adjusted to maintain equilibrium or to lift weights efficiently. Understanding this concept is crucial for applying mechanical principles in various physical therapy and rehabilitation practices, as it highlights how to optimize force generation and movement in patients.