A particle moving with a uniform acceleration travels $24\, m$ and $64\, m$ in the first two consecutive intervals of $4\, sec$ each. Its initial velocity is......$m / \sec $
$1$
$10$
$5$
$2$
A man is at a distance of $6\,m$ from a bus. The bus begins to move with a constant acceleration of $3\,ms ^{-2}$. In order to catch the bus, the minimum speed with which the man should run towards the bus is $.........ms ^{-1}$
A smooth inclined plane is inclined at an angle $\theta$ with horizontal. A body starts from rest and slides down the inclined surface. Then the time taken by it to reach the bottom is