# What is the momentum of a 400"kg" object moving with velocity 8"m"//"s"?

Dec 26, 2016

$p = 3200 \frac{k g m}{s}$

#### Explanation:

Momentum, $\vec{p}$, is given by the product of an object's mass, $m$, and velocity, $\vec{v}$.

$\vec{p} = m \vec{v}$

Given a mass of $400 k g$ and a velocity of $8 \frac{m}{s}$,

$p = \left(400 k g\right) \left(8 \frac{m}{s}\right)$

$\implies p = 3200 \frac{k g m}{s}$

Note that momentum is a vector quantity, but we have no specified a direction. Our calculated value, therefore, is a magnitude.