# Physics homework help, how to set up problem

1. Sep 23, 2008

### RubrickZero

1. The problem statement, all variables and given/known data

A bullet of mass 0.0019 kg moving at 487 m/s embeds itself in a large fixed piece of wood and travels 0.55 m before coming to rest. Assume that the deceleration of the bullet is constant.

What force is exerted by the wood on the bullet?

2. Relevant equations

I think...Vf^2=Vo^2 + 2a(delta X)

3. The attempt at a solution

I don't even know how to set this problem up. I am guessing I am looking for the acceleration?
Much help appreciated.

2. Sep 23, 2008

### LowlyPion

Welcome to PF.

Yes, you can find the acceleration from that.

If you have the deceleration and you have the mass ... hmmm. Any ideas about what the force is?

3. Sep 23, 2008

### RubrickZero

not really....Am I suppose to find the deceleration of the bullet first and after getting that. I should be able to find N?

4. Sep 23, 2008

### Dick

You can find 'a' from your equation, right? F=ma, also right? Can't you find force?