What simple machines used to raise and lower things?

Simple machines used to raise and lower objects include the pulley and the inclined plane. A pulley consists of a wheel with a rope or cable that can change the direction of force, making it easier to lift heavy loads. An inclined plane, such as a ramp, allows objects to be raised by moving them up a slope rather than lifting them vertically. Both devices reduce the effort needed to lift or lower heavy items.