Vật đi từ \(M_o\rightarrow M\) đc góc \(\Delta\varphi=\dfrac{\pi}{3}+\dfrac{\pi}{6}=\dfrac{\pi}{2}\)
\(\Rightarrow\omega=\dfrac{\Delta\varphi}{\Delta t}=\dfrac{\dfrac{\pi}{2}}{0,45}=\dfrac{10\pi}{9}\\ T=\dfrac{2\pi}{\omega}=\dfrac{2\pi}{\left(\dfrac{10\pi}{9}\right)}=1,8\left(5\right)s\)