Question

A train is moving out of a railway station. Is the platform at rest or in motion with respect to the train?

Answer 1

1. Motion is a relative quantity.
2. A body can be at rest with respect to one object and in motion with respect to the other.
3. If a train is moving out of a railway station, it will be in motion with respect to the platform as the platform is stationary.
4. The platform will be stationary with respect to the train.
5. Therefore, a moving train will be in motion with respect to the platform and the platform will be stationary with respect to the train.