Starting from the origin a body oscillates simple harmonically with...

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Starting from the origin a body oscillates simple harmonically with a period of \( 2 s \). After what time will its
\( \mathrm{P} \) kinetic energy be \( 75 \% \) of the total energy
[AIEEE 2006]
W
(a) \( \frac{1}{4} s \)
(b) \( \frac{1}{3} s \)
(c) \( \frac{1}{12} s \)
(d) \( \frac{1}{6} s \)
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