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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 2. The other end o the string is freee. The linear mass density of the string varies linearly from 0 to `lamda` from bottom to top. The acceleration of a wave pulled through out the string is `(pg)/(4)`. Find p.

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3
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