Answer to Question #42 in Mechanics | Relativity for Kris

Question #42
Can a person while on a moving subway escalator be at rest in the reference system associated with the earth?
1
Expert's answer
2010-05-07T10:15:09-0400
A person on an escalator is at rest relative to the escalator, but as the escalator is moving in the frame of land, then a person cannot be motionless in the rest frame of the ground.

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