If you run 10mph inside of a train that is moving 100mph, are you moving 110mph or 100mph?

Question

If you run 10mph inside of a train that is moving 100mph, are you moving 110mph or 100mph?

In: Physics

Answer 1

Context is everything.

From the perspective of the station, 110mph.

From the perspective of a passenger, 10mph.

From the perspective of the sun, roughly the speed of the earth’s orbit.

From the perspective of a bead of sweat on your body, not at all