Q140
A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of ________ .
A.
Gravitational force between train and man
B.
Illusion of the man
C.
The centripetal force
D.
Pressure difference due to fast moving air in between
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
When a fast-moving train passes a man standing on the platform at rest, the air between train and person also moves with greater speed. This rapidly moving air, by Bernoulli's principle will have a lower pressure than the still air a few feet away.