Here's why:
* No absolute point of reference: There is no absolute, fixed point in the universe that we can use as a definitive standard for determining motion or rest.
* Relative to an observer: An object can be considered moving relative to one observer but stationary relative to another. For example, you are sitting still relative to your chair, but you are moving relative to someone walking past.
Examples:
* A passenger on a train: The passenger is at rest relative to the train but moving relative to someone standing on the ground.
* The Earth: The Earth is rotating around its axis and orbiting the Sun. This means it is in motion relative to the Sun, but it is at rest relative to its own surface.
Key takeaway: The concepts of motion and rest are not absolute but depend on the frame of reference of the observer.
