Why does a rolling ball eventually stop moving?

A rolling ball slows down and stops because something gently pushes back against it as it moves.

Imagine you're on a swing. When you kick off with your feet, you go high, but eventually, you come back to the middle and stop swinging. That’s because air and the chains of the swing are working together to slow you down. In the same way, when a ball rolls across the floor, it feels tiny pushes from things like air and the surface it's rolling on, which make it go slower and slower until it stops.

• Air resistance: The air around the ball gently pushes against it as it moves. It’s like having a tiny friend who says, “You’re going too fast, let me slow you down!”
• Friction: When the ball touches the floor, there's something called friction that also works to stop the ball. Think of it like when your shoes stick to the ground as you walk, it helps you move but also makes things slower over time.

Without these little helpers, the ball would keep rolling forever! But with them, it slows down and finally stops, just like you on a swing.