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Hello, I'm Jared, and welcome to "Fun Science Demos".
The big idea today is that some really interesting things happen when
we mix matter and motion. Through science we've discovered that when
matter is moving, when it's in motion, it wants to stay moving.
You might have noticed this in a car. You're driving down the road and the
light turns red,
your parents put on the brakes. The car wants to stop, but you want to keep
moving,
you come forward. That's why you have a seat belt-car stops,
you wanna keep moving. Or on a bicycle. You're riding down a steep hill,
you put on the brakes and you want to keep moving forward. Something-
matter in motion-wants to stay moving. The opposite is true:
when matter isn't moving, it wants to stay like that.
When something's at rest, it doesn't want to move,
and we have a neat little demonstration to show you that in action.
I have pretty simple materials. I have a wooden hoop, a glass and a coin,
and now I need to balance them. So I'm going to balance the wooden hoop on the
glass
and balance the coin on top at the hoop. It's pretty much in line.
Now I have a question for you. I'm going to yank this wooden hoop
off the glass. I wanna know what's going to happen to the coin?
Is the coin gonna go flying off with the hoop? Or is the coin gonna wanna
stay
still? Let's check it, out here we go.
One, two, three... what just happened?
I yanked the hoop out, but the coin
dropped into my glass. It drop straight down.
Science in action. That coin was at rest, and it wanted to stay at rest.
That hoop was in motion, and the coin wanted to stay at rest and it dropped
right down into the glass.
Scientists have a name for this. That property of matter
is called inertia. Science is so cool. Don't forget to check out our links in
our video description.
Thanks for watching.