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Q.

The vertical extension in a light spring by a weight of 1 kg suspended from the wire is 9.8 cm. The period of oscillation

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a

20πsec

b

2πsec

c

2π/10sec

d

200πsec

answer is C.

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Detailed Solution

∵mg=kx⇒mk=xg⇒T=2πmk=2πxg=2π9.8×10−29.8=2π10sec
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