Pei is sitting on a train that is stopped. On one side of her train there is a station. On the other side of her train is another train. When Pei looks at the other train, she appears to be moving backward. When she looks at the station, she does not appear to be moving. How might Pei explain this situation?

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Answers

2014-10-19T11:33:20+08:00
Pei may explain the situation by because the other train that is why she appears to be movingĀ 
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2014-10-21T19:08:15+08:00
The other train is moving while her train is not











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