The History of Levers

Enjoy this video. Ancient Egypt used them to build pyramids!

Simple Machine: Lever (Short Video)

Enjoy this video! "Give me a lever long enough and a fulcrum on which to place it, and I shall move the world." ~Archimedes ...

Newton 1st Law (short video)

Enjoy this short video. Newton 1st Law is introduced by Newton. It is essentially the same with Galileo's concept of inertia. ...