A stationary wave is represented by $y=A \sin (100 t) \cos (0.01 x)$, where $y$ and $A$ are in millimetres, $t$ is in second and $x$ is in metre. The velocity of the constituent wave is ........... $m / s$
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(a)
$y=A \sin 100 t \cos 0.01 x$
$\omega=100 \quad k=0.01$
$v=\frac{\omega}{k}$
$\text { or } v=10^4 \,m / s$
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