What is Archimedes’ principle?

Archimedes’ principle is all about why things float or sink, like when you jump into a pool and feel lighter.

Imagine you're in a bathtub full of water. When you sit down, the water pushes up on your body, that's buoyancy! Archimedes figured out that the force pushing you up is equal to the weight of the water you pushed aside, called displaced water.

Think about it like this: If you're in a bathtub and you're full of air, it's easier to float. But if you fill your lungs with water, like when you go underwater, you sink because now you’re pushing aside less water, so the buoyant force is smaller.

If something weighs less than the water it pushes aside, it floats, just like a toy boat in a lake. If it weighs more, like a rock, it sinks. That’s Archimedes’ principle, simple and fun! Archimedes’ principle is all about why things float or sink, like when you jump into a pool and feel lighter.

Imagine you're in a bathtub full of water. When you sit down, the water pushes up on your body, that's buoyancy! Archimedes figured out that the force pushing you up is equal to the weight of the water you pushed aside, called displaced water.