Question

A man is sitting in a train which is moving. Is he at rest or in motion?

Answer 1

Hint: The concept of rest and motion is completely relative, an object in motion on earth may be in rest for a celestial body, and stars in motion can be in rest for a human being on earth. When sitting on a moving train, the relative motion will appear in the picture, so the answer is given by observing it from the ground.

Complete answer:
Suppose the person is sitting on a train and the train is moving. This means that the train also carries relevant personnel. The same is true for human movements. But perseverance changes when the framework changes. For spectators sitting on the train, the train does not run, and passengers sitting on the same train do not move.

But the rest of the world is in action. For every observer standing outside the train, the train is moving, and the passengers sitting on the train are also moving. In this way, the person concerned has an impulse towards the floor observer.

Hence, for a person sitting on the train, the said person is at rest while for an audience outside the train, the person in the train is moving.

Note: Unless otherwise stated, it is a standard parameter considered from the ground state. Everything in the universe has momentum and kinetic energy. Only when you look at the reference frame of the object, it will look different, every particle is in a dynamic state. The theory of relativity given by Einstein has a lot to do with this.