Slow Motion Flipping Cat Physics Smarter Every Day 58
Hey it's me Destin Welcome back to SmarterEveryDay So you've probably observed that cats almost always land on their feet Today's question is why. Like most simple questions there's a very complex answer
For instance let me reword this question How does a cat go from feet up To feet down In a falling reference frame without violating the conservation of angular momentum Now I've studied free falling bodies, my own in fact in several different environments and once i get my angular rotation started in one direction, I can't stop it. Today, we're going to use a high speed camera we're not going to use Alley
because this is my daughter's cat, i don't want to hurt it we're going to use a stunt cat let me introduce you to GiGi the stunt cat (music) I'll just flip the uh, the tutorial vertical and then motion track the cat it's just going to take a lot more effort in post
We're going to try to do it in a way that doesn't make anybody mad That's pretty hard to do. You gotta drop the cat Ready GiGié Good kitty Checking out the high speed data there GiGié Ok the first thing a cat does when it's falling is try to figure out which way is up.
It does this either with the gyro in the ear or with its eyes Ready to talk cat physicsé Alright. So check out this footage i captured with the Phantom Miro While GiGi goes to get a drink of water. So here's what's interesting about this to me. You'll notice that at the beginning of the drop the cat is not rotating
halfway through the drop the cat is rotating and at the very end GiGi somehow stopped rotating Newton's law says an object at rest will stay at rest unless acted on by an external force I see no external forces on this cat So what's happening hereé It's not making sense to me O.K. so in order to really get the right data