Question

What is the SI unit of momentum?

• A. $N$
• B. $Ns$
• C. ${ms}^{-2}$
• D. $kg$

Answer 1

The correct option is B $Ns$

Momentum is the product of mass and velocity. Hence, the SI unit of momentum is $kgm{s}^{-1}$.

Also, the unit Newton can be wriiten as:
$1N=kgm{s}^{-2}$.
$⟹1Ns=kgm{s}^{-1}$.

Hence, $Ns$ is also the unit for momentum.