Question

Which of the following is in motion with respect to a person sitting in a moving train?

• A. Light bulb of the train
• B. Seats of the train
• C. Trees outside the train
• D. Windows of the train

Answer 1

The correct option is C Trees outside the train

An object is in motion or at rest depending on the person observing it.
If a body changes its position with respect to the observer then, body is said to be motion otherwise rest.
The train and all of its parts are at rest with respect to the person, as he is also a part of the train.
However, the trees outside are on the ground and are not the part of the train. Thus trees are in motion with respect to the observer inside the train.