A sphere of mass \( 2\,\text{kg} \) and radius \( 0.5\,\text{m} \) is rolling with an initial speed of \( 1\,\text{m}\,\text{s}^{-1} \) goes up an inclined plane which makes an angle of \( 30^\circ \) with the horizontal plane, without slipping. How long will the sphere take to return to the starting point \( A \)?
