Answer:
The angular frequency [tex]\omega[/tex] of the oscillation is [tex]0.58s^{-1}[/tex]
Explanation:
For this particular situation, the angular frequency of the system is given by
[tex]\omega=\sqrt{\frac{m_1+m_2}{m_1m_2}k}=\sqrt{\frac{7 kg+5 kg }{7kg *5 kg}1\frac{N}{m}}=\sqrt{\frac{3}{35s^2}}\approx 0.58s^{-1}[/tex]