After learning about the lever, wheel and axle, pulley, inclined plane, wedge and screw, the students designed a future Hilltop playground, one that included examples of each simple machine studied.

From catapults to caterpillar tractors, machines throughout the ages have served man and lightened the workload. Fourth-graders at Hudsonville's Park Elementary School learned just how simple machines ...

A weight machine is an exercise machine used for weight training that uses gravity as the primary source of resistance, and a combination of simple machines to convey that resistance to the person ...