Wheelbarrow is a device for moving loads. It consists of a tub or box mounted on a wheel with two handles that extend under the body and join on the axle of the wheel. Wheelbarrows may be made of wood, plastic, or metal. They usually have rubber tires.
The wheelbarrow is a second-class lever (see Lever). It helps people lift loads with less effort. The longer the handles of the wheelbarrow, the less force required to lift a given load.
