What's a reference frame? Think of it like a big, invisible grid that helps us talk about where things are in space! It's like using a map to point out where you live.

Main Components

• A starting point or origin.
• A set of axes. Imagine drawing lines on your map to make it look like a grid.

Popular Frame: The Cartesian Reference Frame 📏

• Most loved in IBDP Physics.
• Ever seen a 3D graph? That's our guy.

But there are others 🌐

• Ever heard sailors talk about latitude and longitude? They’re using angles to locate themselves on the Earth. Add in how high you're flying in the sky (distance from Earth's center), and you've got another way to describe positions, without needing x, y, and z!

Stargazing tip 🌌: Astronomers use angles to spot stars. They just need two angles. Why? Because they usually don’t worry about how far away the star is.

Our planet is like a merry-go-round. If you stand on it (like we all do), it feels like everything in space is spinning around us. It's like being at the center of a gigantic universal disco party!

Plot Twist: Anything that seems still to us on Earth isn't really cruising straight and steady. That's why