A rocket is fired vertically from the earth with an acceleration of 2 g, where g is the gravitational acceleration. On an inclined plane inside the…

A rocket is fired vertically from the earth with an acceleration of $\displaystyle 2 g$, where $\displaystyle g$ is the gravitational acceleration. On an inclined plane inside the rocket, making an angle $\displaystyle \theta$ with the horizontal, a point object of mass $\displaystyle m$ is kept. The minimum coefficient of friction $\displaystyle \mu_{\text {min }}$ between the mass and the inclined surface such that the mass does not move is :