Hi, we're here from Curiosity.com to help you get smarter in just a few minutes.

I'm Cody Gough.

And I'm Ashley Hamer.

Today you learn about why you don't weigh the same everywhere on Earth, the personality traits

shared by people who live past 90, and how researchers

figured out how shoelaces come untied.

Let's untie some curiosity.

Here's something fun.

You don't weigh the same everywhere on Earth.

Your mass stays consistent no matter where you are,

but you'd actually weigh less standing at the equator

than you would at a pole.

Today, you're going to learn about centrifugal and

centripetal forces so I can help you understand the gravity of this

situation. Picture this. Imagine you're carrying a plastic bag filled with

a few oranges. If you swing that bag over your head at the right

speed in the shape of a circle, the oranges will stay in the bag. If you swing it too fast,

the oranges might bust out through the bottom of the bag and get flung halfway across the room.

Congrats, you just learned about centrifugal and centripetal forces.

Centrifical force is what would cause the oranges to bust out of the bottom of the plastic bag.

It's defined as the apparent force equal and opposite to the centripetal force

that draws a rotating body away from the center of rotation caused by the inertia of the body.

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