# Kinetic Friction Problem

1. Oct 20, 2014

### JohnSmith12

Last edited: Oct 20, 2014
2. Oct 20, 2014

### NTW

The velocity is constant, and that means that the acceleration is zero. That has something to do with the net force...

3. Oct 20, 2014

### Staff: Mentor

OK, but that step was unnecessary. (You were given mg, and that's what you need.)

mk, usually symbolized as $\mu_k$, is what you are solving for. Use NTW's hint to determine for the force of friction, Ff. Then you can solve for the coefficient of friction.