Answer to Question #18996 in Mechanics | Relativity for Sam
If you’re on a bus driving at a certain speed, and you could somehow levitate, not touching the ground or the chairs, would you eventually move to the back of the bus or would you stay stationary?
If you are already moving with the same speed as the bus, you would continue moving at that same speed and remain at rest relative to the bus. This is Newton's first law of motion.
If the speed of the bus changed, you would continue to travel at the original speed and move backward or forward relative to the bus- depending on whether the bus slowed down or sped up.