PHYSICS: So what’s your theory about the cause of motion? And remind me again why didn’t that pen go flying across the room instead of dropping into the bottle? No audio today, so this is a lesson from last year that combines today’s lecture and tomorrow – you get the preview for free! 🙂

I love Newton’s first law – the law of inertia! Where else do you see it in action in your world?

Let’s play with this concept on Monday. Can you use what you know about mass and inertia to find the mass of an unknown object? I know you can! 🙂

PHYSICS 10-22-14 Forces & Newton’s Law of Inertia from Tammy Skinner on Vimeo.