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A train is moving forward with a horizon...

A train is moving forward with a horizontal acceleration a. A man sitting in the train drops a coin on the floor of the train . The acceleration of the coin w.r.t man is

A

g downward

B

a downward

C

` sqrt(a^(2) + g^(2)) at tan ^(-1)(g/a)` with horizontal in forward direction

D

` sqrt ( a^(2) + g^(2) ) at tan ^(-1) (g/a)` with horizontal in backward direction

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The correct Answer is:
D
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