Question

The SI unit of momentum is:

• A. $kgm{s}^{-2}$
• B. $gm{s}^{-2}$
• C. $kgm{s}^{-1}$
• D. $gm{s}^{-1}$

Answer 1

The correct option is C $kgm{s}^{-1}$

Momentum of an object is the product of it’s mass and velocity. The SI units for mass and velocity are $kg$ and $m{s}^{-1}$ respectively.

$\Rightarrow \text{Momentum}=\text{mass}\times \text{velocity}$
$\Rightarrow \text{SI unit of momentum}=kg\times m{s}^{-1}=kgm{s}^{-1}$

Thus, the SI unit for momentum is $kgm{s}^{-1}$