What is linear momentum? Write its $SI$ unit.

(N/A) The product of the mass and velocity of a body is called its linear momentum.
$\therefore$ Linear momentum $(P)$,
$P = \text{mass} \times \text{velocity}$
$P = m v$
Momentum is a vector quantity,and its direction is the same as the direction of velocity.
The $SI$ unit of momentum is $kg \cdot m/s$ or $N \cdot s$.
The $CGS$ unit of momentum is $g \cdot cm/s$.
The dimensional formula of momentum is $[M^1 L^1 T^{-1}]$.