A particle of charge per unit mass $\alpha$ is released from the origin with velocity $\overrightarrow{\text{v}}={\text{v}}_0\widehat{\text{i}}$ in the magnetic field
        $\overrightarrow{\text{B}}=-{\text{B}}_0\widehat{\text{k}}$  for  $\text{x}\le \frac{\sqrt{3}}{2}\frac{{\text{v}}_0}{{\text{B}}_0\alpha }$
and   $\overrightarrow{\text{B}}=0$  for  $\text{x}>\frac{\sqrt{3}}{2}\frac{{\text{v}}_0}{{\text{B}}_0\alpha }$
The x-coordinate of the particle at time $\text{t}\left(>\frac{\pi }{3{\text{B}}_0\alpha }\right)$ would be