Relative velocity

Well hello there! Do you like to play with toy cars or fly kites? Have you ever wondered why the way they move changes when you run, walk or stand in one place? That's because everything is moving all the time.

If you've ever been in a car and seen another car on the road, it looks like it's standing still. But if both cars keep moving, they are actually moving RELATIVE to each other. That's what relative velocity means - it's the change in position of something relative to something else that's also moving.

Imagine you are sitting still on your bike and your friend passes by on her bike. She is moving and you are not, so her velocity (the speed at which she is moving) is different from yours. But if you start pedaling, you now have a velocity too! And if you move faster than your friend, she will now be moving relative to you.

So, relative velocity is basically comparing how fast one thing is moving compared to another thing that's also moving. Just like how you compare your speed to your friend's speed when you ride your bikes together. It can get a little tricky, but it's a cool way to understand how everything is always moving!