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Oscillations

# In an S.H.M if amplitude is 3 m and spring constant is 3 N/m and maximum velocity is 3 m/s , find the angular frequency (w) ?

$(a)\;1\qquad(b)\;2\qquad(c)\;3\qquad(d)\;None\;of\;these$

Explanation :
By conservation of energy
$\large\frac{1}{2}\;KA^2=\large\frac{1}{2}mv^2$
$3\times 3 \times 3=m \times 3 \times 3$
$m=3 Kg$
$w=\sqrt{\large\frac{K}{m}}=\sqrt{\large\frac{3}{3}}=1 \;rad/s$