ELI5, why if you jump inside a moving train you will land on the same spot, but if you jump on the roof of a moving train, you land on a different spot?

Question

seen it on twitter and I can’t get my head around it
EDIT: thanks guys I get it now 😅

In: Physics

Answer 1

We land on the same spot, when we jump inside, because you’re moving along with the moving train! (YOU HOP UP INTO IT, HAVING THE HANDLE IN YOUR HAND….YOU’RE MOVING WITH IT!)

Whereas, when you jump on the roof(say, from a chopper)….it drops you down, where you leave it( means: it leaves you at the foot of the perpendicular from the position of the chopper((when you left)) ) while the train is still moving!

This is why it happens!