# Force of bullet leaving rifle

1. Oct 18, 2009

### physicsquest

1. The problem statement, all variables and given/known data
A 5.0g bullet leaves the muzzle of a rifle with a speed of 320 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.82 m long barrel of the rifle?

2. Relevant equations
$$\Sigma$$F=ma

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Oct 18, 2009

### Donaldos

It might be simpler to use the work-energy theorem here:

$$W=\Delta E_k$$