Which of the following is an example of a first class lever?

A first-class lever is a type of simple machine characterized by having the fulcrum placed between the load and the effort. This arrangement allows for a mechanical advantage, enabling the user to lift a heavy load with less effort.

In the case of a pry bar, it serves as a perfect example of a first-class lever. When using a pry bar, the fulcrum is located underneath the point where the bar makes contact with the surface. The effort is applied at one end of the bar, while the load is at the other end. This configuration allows the user to lift and move heavy objects effectively by positioning the fulcrum in a way that reduces the amount of force required.

The other options represent different types of levers. A wheelbarrow is a second-class lever, where the load is between the fulcrum and the effort. A shovel works as a third-class lever, where the effort is between the load and the fulcrum. A screwdriver also typically operates as a second-class lever when being used to pry something open, with the hinge point acting as the fulcrum. Therefore, the pry bar stands out as a clear example of a first-class lever due to its effective arrangement of fulcrum, load,