The majority of the 300 million tons of plastic produced every year isn’t recycled, and recycling that does happen typically happens at an industrial scale in factories using equipment that can cost ...

A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called ...

A simple machine is a tool that helps us do work. They use clever shapes to help us move, lift, cut and other types of work. Learn more about the inclined plane, the pulley, the lever, the wheel and ...