Question
If you are seated in sound proof room without window, can you detect if room is moving with a uniform velocity? Can you detect a uniform acceleration motion of room?
Solution
Any body which is moving with a constant velocity, does not experience any unbalanced force. When the soundproof room is moving with constant velocity, then we cannot detect the motion of room.
If the room is uniformly accelerated then there is net unbalanced force and in order to keep the bodies stable inside the room one has to exert the force. Hence accelerated motion of room can be detected.
