Two bodies $A$ and $B$ start from rest from the same point with a uniform acceleration of $2\,m / s ^2$. If $B$ starts one second later, then the two bodies are separated, at the end of the next second, by $.............\,m$
$1$
$2$
$3$
$4$
A particle is moving in a straight line and passes through a point $O$ with a velocity of $6\;m{s^{ - 1}}.$ The particle moves with a constant retardation of $2\;m{s^{ - 2}}\;$ for $4$ s and there after moves with constant velocity. How long after leaving $O$ does the particle return to $O$..........$s$
A truck starts from rest and accelerates uniformly at $2.0\; m s ^{-2} .$ At $t=10\; s$, a stone is dropped by a person standing on the top of the truck ($6 \;m $ high from the ground). What are the $(a)$ velocity, and $(b)$ acceleration of the stone at $t= 11\;s$? (Neglect atr resistance.)
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