The acceleration of a particle in S.H.M. is \( 64 \mathrm{~cm} \mat...

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The acceleration of a particle in S.H.M. is \( 64 \mathrm{~cm} \mathrm{~s}^{-2} \), when its displacement from the mean position is \( 4.0 \mathrm{~cm} \). (i) Taking the value of \( \pi=3 \cdot 14 \), calculate its time period. (ii) When the displacement is \( 2.0 \mathrm{~cm} \), what is its acceleration?
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