# Average velocity

1. Dec 21, 2009

### God's Pen

Hello
suppose we have a gas (ideal) inside that gas there are particles ($$N$$
particles) and each particle has a certain velocity $$v$$.
i want to find the average velocity of all the particles inside that gas.
would it be $$\mathbb{V}=\frac{\sum_{1}^{n}v_i}{N}$$
$$\mathbb{V}$$ the average velocity.
thanks.

2. Dec 21, 2009

### Staff: Mentor

Wouldn't the upper limit on the sum also be N?

3. Dec 21, 2009

### God's Pen

yes,i meant N,is it okay ?

Last edited: Dec 21, 2009