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    Question

    A boy sitting in a train moving with a uniform velocity

    drops a coin outside. A man standing outside the train will find the trajectory of the coin to be -
    A a parabola Correct Answer Incorrect Answer
    B a horizontal straight line Correct Answer Incorrect Answer
    C a vertical straight line Correct Answer Incorrect Answer
    D a circle Correct Answer Incorrect Answer

    Solution

    Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So, by Newton's first law, it continues its motion horizontally with that velocity.

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