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Question

A person is sitting on a moving train and is facing the engine. He tosses up a coin which falls behind him. The train is moving :

A
forward and gaining speed.
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B
forward and losing speed
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C
backward and losing speed
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D
backward and gaining speed.
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Solution

The correct options are
A forward and gaining speed.
C backward and losing speed
From the frame of reference of train, a pseudo force on coin must act in backward direction for it to move behind, which is possible only when the train is moving forward and gaining speed and also when the train is moving backward and losing speed.Therefore (A) and (C)

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