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A person in a lift which descends down with an acceleration of 1.8 $m / s^{2}$ drops a stone from a height of 2m. The time of decent is

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detailed solution

Correct option is D

Relative acceleration 9.8 –1.8 = 8 m / s2t = 2ha = 2×28 = 12sec

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A person in a lift which descends down with an acceleration of 1.8 m/s2 drops a stone from a height of 2m. The time of decent is

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A person in a lift which descends down with an acceleration of 1.8 $m / s^{2}$ drops a stone from a height of 2m. The time of decent is