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The periodic time of a body executing simple harmonic motion is 3 sec. After how much interval from time t = 0, its displacement will be half of its amplitude             [BHU 1998]

A.            \[\frac{1}{8}\]sec               
B.            \[\frac{1}{6}\]sec
C.            \[\frac{1}{4}\]sec               
D.            \[\frac{1}{3}\]sec
Answer» D.            \[\frac{1}{3}\]sec


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