The maximum acceleration of a $5\,kg$ block is $.............\,m/s^{2}$.

$A$ force separately produces accelerations of $18 \ m/s^2$,$9 \ m/s^2$,and $6 \ m/s^2$ in three bodies of masses $P$,$Q$,and $R$ respectively. If the same force is applied on a body of mass $P+Q+R$,then the acceleration of that body is: (in $m/s^2$)

Newton's second law gives the measure of

The time taken by a force of $2 \ N$ to produce a change of momentum of $0.4 \ kg \ m \ s^{-1}$ in a body is: (in $s$)

The linear momentum $p$ of a body moving in one dimension varies with time according to the equation $p = a + bt^2$,where $a$ and $b$ are positive constants. The net force acting on the body is

$A$ force vector applied on a mass is represented as $\vec F = 6\hat i - 8\hat j + 10\hat k$ and accelerates the body with $1\;m/s^2$. What will be the mass of the body in $kg$?