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One end of a string of length L is tied ...

One end of a string of length L is tied to the ceiling of a lift accelerating upwards with an acceleration 2g. The other end of the string is free. The linear mass density of the string varies linearly from 0 to from bottom to top (A) The velocity of the wave in the string will be 0. (B) The acceleration of the wave on the string will be 3g/4 every where. (C) The time taken by a pulse to reach from bottom to top will be 8L/3g. (D) The time taken by a pulse to reach from bottom to top will be 4L/3g.

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