A body is attached to the lower end of a vertical helical
spring and it is gradually lowered to its equilibrium position.
This stretches the spring by a length x. If the same body
attached to the same spring is allowed to fall suddenly,
what would be the maximum stretching in this case?
(a) x (b) 2 x
(c) 3 x (d) x/2
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Answer:
the correct option is b
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