# Homework Help: One dimensional motion with friction

1. Dec 3, 2005

### mahdilm

Hello,

I was wondering if someone could help me out with this one. Its been years since I've done physics and this problems is bugging the hell out of me.

Thanks

2. Dec 3, 2005

### GeoMike

Hint:
You know the coefficient of friction, but you don't know the frictional force, nor do you know the normal force. You do have a common element to both the frictional force and the normal force though. Try eliminating it and then working from there.

GM

3. Dec 3, 2005

### mahdilm

$$F_{f}= \mu N$$