A block of mass 1 kg hangs without vibrating at the end of a spring whose force constant is 200 N/m and which is attached to the ceiling of an elevator. The elevator is rising with an upward acceleration of g/3 when the acceleration suddenly ceases. The angular frequency of the block after the acceleration ceases is

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13 rad/s

14 rad/s

15 rad/s

None of these

answer is B.

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Detailed Solution

The angular frequency isω=km=2001≈14rad/s

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