This Weird Shape Rolls Uphill Instead of Down

Hey everyone, today I'm going to show you some things that fall up

instead

of down, so I have a ramp set up here. You can see that

this

end is definitely higher than

this

one to show that the table is not tilted. You can see my The level here is flat, but then place it here and the bubble is up here so you can see this is definitely tilted. You can also see that it is tilted. If I put a cylinder on it, it will roll off the end, but then something strange happens when I put this on it, it doesn't go down, in fact, if I start it at the bottom of the hill, it goes up now this is really strange, look at this, what the hell, so look at both at the same time now they're going in opposite directions.

What happens if we change them? Then they contain each other. We can even make it a little steeper. Here it still rises so strangely again. They are both there. So if I make it a little bit steeper, set it here. It should roll down to the right, but now it stays in place, whereas this one just comes out really fast eventually, if I steepen it enough, I can get it to roll down. This isn't the only phenomenon I've seen where things can roll

uphill

, for example check out this previous video I made with the Styrofoam disc.

You can see that it's an easily curved surface that rests on these books here, but when I try to roll it down, it curls up. How does this happen? How can anything? rolling

uphill

or basically falling well, what about the things we know naturally to just move up like a balloon for example? Well, the reason a balloon goes up is not necessarily that it is falling upward, but rather that it is being pushed up, in fact, gravity is still pulling. things down, in fact, it's pulling the air around it down, it's pulling the balloon down, but the air is being pulled a little bit harder than the balloon, so the air goes underneath and pushes the balloon down. above, that means that if we were to take the air out of the situation, for example, place a helium balloon in a vacuum chamber, then the helium balloon will simply fall as usual and as you can see here, that is exactly what It happens so when I turn on my vacuum chamber the balloons will expand and what I do.

What I'm going to try to do and hope for is that they will expand, but I'll keep the balloon pressurized enough that the air outside is less dense than the helium inside and at that point the helium balloon should fall. I'm going to fall, I'm trying to turn it off right before they explode, oh, that one fell, let's see, it stops floating and, oh, they both fell, look at that, so even the things that we know are moving up are only moving down. up because things around us are moving down faster than it is and that's why it stops and causes it to be pushed up so how did I just show you two things that appear to be moving up

instead

of down?

Well it's because they're actually moving down but not up, for something to fall, that means its center of mass or its center of gravity if you could locate the midpoint of the weight of the object, that's its center of mass. or center of gravity that will always move down as soon as you let go of an object, for example, a cool way to find the center of mass of an object that has a smooth stick, like this, just move your fingers towards the center and eventually They will find the center by themselves at an exact balance point, so you will notice in this mop that the center point or the center of gravity is not exactly in the middle.

This side is longer than this side, but because this side has more weight, the center of gravity is pushed in this way, so the center of gravity is not always at the same point. as the center of the object, in the case of this cone

shape

here the center of mass is directly in the center. Now let's look at where the center of mass goes when I let go and it

rolls

uphill. You will notice that the center of mass. it's here to start and then I let it go and it actually ends up lower than it was when it started, so the cone didn't actually fall, it still fell to fall, it had to roll, but that roll it did. lower in the center of gravity, so it kept falling and the same with the Styrofoam disc I showed.

The Styrofoam disc only had a weight on one side and that caused the center of mass to be crooked and therefore the center of mass. it actually ends up lower when he

rolls

up the books and thanks for watching another action lab episode. I hope you enjoyed it if you have any questions or comments let me know in the comments section and I will try to answer them and if you haven't visited actionlab.com you can check it out and see the Action Lab experiment boxes and see the experiment book that It's for sale there too.

Thanks for watching and see you next time.