If a simple pendulum oscillates with an amplitude of $50\, mm$ and time period of $2\, sec$, then its maximum velocity is .... $m/s$
AIIMS 1998, Easy
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(b) ${v_{\max }} = a\omega $
$= a \times \frac{{2\pi }}{T} $
$= (50 \times {10^{ - 3}}) \times \frac{{2\pi }}{2}$
$= 0.15\,m/s$
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