在 火車車箱內起飛，然後停在空中，是否如始終會被車尾撞飛﹖

Don't forget that there is air inside the moving train compartment. The air moves along with the train and hence it is relatively at rest with the train. This is the reason why you would not feel any blowing wind when sitting inside a train if all windows are closed.

A fly or a bee flies in the air inside the train compartment. Since such mass of air is moving with the train, the fly or bee will also moves with the train, eventhough they are seen to remain stationary in mid air.

大體上,地球在轉動也有相近似考慮。