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 ...

When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.