Throughout history, humans have developed several simple machines to make work easier. The most notable of these are known as the "six simple machines": the wheel and axle, the lever, the inclined ...

Find out how simple machines makes work easier on this Science Trek. Simple machines include the lever, the inclined plane, the wedge, the pulley, the wheel and axle, and the screw. Combine these and ...

MT. COMFORT — Cayden Spoon stood before his fellow third-graders in his class at Mt. Comfort Elementary School. A model of a bed with a crank on the end of it rested on the table before him. “Are you ...