Question : A man standing close to the platform at a railway station experiences a pulling force towards a fast-moving train because of _____________.
Option 1: gravitational force between the train and the man
Option 2: illusion of the man
Option 3: the centripetal force
Option 4: pressure difference due to fast-moving air between
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Correct Answer: pressure difference due to fast-moving air between
Solution : The answer is the pressure difference due to fast-moving air between them .
Because of the pressure differential caused by fast-moving air between the train and the man, a man standing near the platform at a railway station feels a pulling force towards the train. When a fast-moving train passes someone on the platform, the air between the train and the man moves faster than the air behind the man. The pressure between the train and the person is thus lower than the pressure behind the person. This pressure differential exerts a pulling force.
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