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One end of a light spring of natural len...

One end of a light spring of natural length d and spring constant k is fixed on a rigid wall and the other is attached to a smooth ring of mass m which can slide without friction on a vertical rod fixed at a distance d from the wall. Initially the spring makes an angle of `37^(@)` with the horizontal as shown in fig. When the system is released from rest, find the speed of the ring when the spring becomes horizontal.
[ sin `37^(@)` = 3/5]

A

`dqrt((3g)/(2d)+(k)/(16m))`

B

`dsqrt((2g)/(3d)-(k)/(21m))`

C

`dsqrt(-(4g)/(2d)+(k)/(12m))`

D

`dsqrt(-(8g)/(4d)+(k)/(28m))`

Text Solution

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The correct Answer is:
A
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