A wheel initially at rest is subjected to a uniform angular acceleration about its axis. In the first 2 s it rotates through an angle θ_1 and in the…

A wheel initially at rest is subjected to a uniform angular acceleration about its axis. In the first $\displaystyle 2$ s it rotates through an angle $\displaystyle \theta_1$ and in the next $\displaystyle 2$ s it rotates through an angle $\displaystyle \theta_2$. The ratio $\displaystyle \frac{\theta_2}{\theta_1}$ is $\displaystyle \_\_\_\_$.