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

If you are moving with constant speed, you technically should land on the same spot but if you are on the roof, there´s a lot of air resistance and that will slow you down so it would be like you landed behind from the spot you jumped