Forget What Your Teacher Said: Mass and Weight are the Same

By Jamie Condliffe on at

At school, your physics teacher probably drummed it into you that mass and weight are completely different things. Actually, they were wrong all along.

In this video, Professor Mike Merrifield from the University of Nottingham, along with Albert Einstein and Isaac Newton, explains the equivalence principle. It says that mass and weight are, really, the same thing. Maybe you should go tell your old teacher. [Sixty Symbols]