$Ns$ is the unit of which physical quantity? Write the dimensional formula of momentum.

(IMPULSE) $1$. The unit $Ns$ (Newton-second) is the unit of Impulse or Change in Momentum.
$2$. Impulse is defined as the product of force and time: $J = F \times \Delta t$.
$3$. Momentum $(p)$ is defined as the product of mass and velocity: $p = m \times v$.
$4$. The dimensional formula for mass is $[M^1 L^0 T^0]$ and for velocity is $[M^0 L^1 T^{-1}]$.
$5$. Therefore,the dimensional formula for momentum is $[M^1 L^1 T^{-1}]$.