What characterizes a third-class lever?

A third-class lever is characterized by the position where the effort is applied between the fulcrum and the load. In this configuration, the load is typically located at one end of the lever, while the fulcrum is at the opposite end. The application of effort between these two points allows for a greater range of motion and speed at the load end, even though it requires more effort to lift the load compared to first or second-class levers.

This setup is commonplace in daily tools and activities, such as a pair of tweezers or a fishing rod, where the user applies force to manipulate an object. The mechanics of a third-class lever effectively illustrate the trade-off between effort and distance, showcasing their role in increasing the speed or distance moved rather than the force applied. Thus, the correct configuration that defines a third-class lever is indeed one where the effort is positioned between the fulcrum and the load.