Asked by kelvin calin
According to Einstein’s first postulate about the special theory of relativity, which best explains why a person feels like he or she is sitting still on a train that is moving at a constant speed of 60 miles per hour?
The train is moving more slowly than the speed of light.
The person is moving at the same speed as the train.
The motion of the train and of the person are not relative to each other.
The reference frame of the person is inside the train.
All Answers 1
Answered by
GPT-5 mini
AI
The reference frame of the person is inside the train.
Reason: By Einstein’s first postulate (the principle of relativity), all inertial frames are equivalent, so a person co-moving with the train is at rest in the train’s reference frame and cannot detect the train’s constant-velocity motion from inside.
Reason: By Einstein’s first postulate (the principle of relativity), all inertial frames are equivalent, so a person co-moving with the train is at rest in the train’s reference frame and cannot detect the train’s constant-velocity motion from inside.
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