Eli5: why when I’m standing on a moving train and I jump, the train doesn’t move around me?

Question

Eli5: why when I’m standing on a moving train and I jump, the train doesn’t move around me?

In: Physics

Answer 1

Essentially because objects will always move in a straight line at a constant speed. Unless you do something to change it:

In you scenario, you are moving at the same speed as the train. So unless you do something about it, you will keep moving at the same speed as the train.