conuly

We're going over the Laws of Motion (especially gravity). Everybody understands that acceleration due to gravity, on earth, is pretty much a constant (9.8 m/s², give or take .001 if you're on a very high mountain). We all understand that heavy objects really don't fall faster than lighter ones (as demonstrated by crumpling up paper and dropping it, noting that once there's no significant air resistance it falls like a rock). He demonstrates the fact that a ball thrown horizontally will hit the ground in the same amount of time as one dropped from the same height.

But that's not good enough. Now the questions have to start. What if it's a gun? What if it's going really fast, say 5000 m/s? You can't say that'd land at the same time!

Um, yes, yes I can. Because it's true. After one second, it'll drop 4.9 meters. After two, it'll have dropped nearly 20. You can't defeat the universal law of gravity simply by running faster. This isn't a roadrunner cartoon, it's real life.

Honestly, I don't know where people get these ideas from.

Oh, and the orajel thing? I ended up with the adult orajel. Bad idea. It's a liquid, and there's NO way to apply it without it sloshing all over your mouf. Weehwee. It's like I've been chewing on ice, here! Which would've been helpful, now that I think of it... Anyway, I should've stuck with children's orajel, teething formula. That doesn't taste nearly as nasty, and it's in a GEL. It goes where you put it.