In a third-class lever system, where is the effort applied?

In a third-class lever system, the effort is applied between the load and the fulcrum. This configuration allows for a greater range of motion and speed at the load, even though it requires a greater effort to lift the load compared to first or second-class levers.

In this type of lever, when force is applied to the effort, it moves the load at a different distance and speed, which is particularly useful in activities that require quick motions, such as in sporting actions like throwing a ball. The position of the effort being between the fulcrum and the load is what distinguishes third-class levers and makes them effective in many physical activities.

The other locations for effort, such as at the fulcrum, at one end, or being variable, do not fit the definition of a third-class lever, where the specific arrangement is fundamentally designed to enhance speed and range of motion at the cost of a mechanical advantage in terms of force.