Web Reference: Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/m......more But from the train's reference frame, it's the train that is at rest and it's the ground that is moving. So look, whether something is moving or not and the speed at which it's moving and the direction in which it's moving, all of that depends. Jul 4, 2025 · This becomes clear if we consider the perspectives from different reference frames. Whether an object is at rest or in motion depends on the choice of reference frame.
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