# Inclined Planes; Finding Force of Friction

1. Jul 9, 2008

### mykoolspam

1. The problem statement, all variables and given/known data
A 275 N box is sliding down a frictionless inclined plane. If the incline makes an angle of 30.0 degrees with the horizontal, what is the acceleration along the incline?

I dont need to know how to figure out the solution to this problem - yet, atleast.
Im trying to figure out how to find the Force of friction.
Could anyone help me out on this?

Through my calculations, i have determed:
Fg = 275 N
F[Parallel] = 157.73 N
mass = 28.03 kg

2. Jul 9, 2008

### jeffreydk

The force of friction is defined to be $$\mu \mathbf{N}\text{ where } \mu \text{ is the frictional constant and } \mathbf{N}$$ is the normal force. But there is of course no friction involved in this problem.

3. Jul 9, 2008

### mykoolspam

..yeahhhh....okkay?
Im trying to figure it out without that formula..

4. Jul 9, 2008

### jeffreydk

Hmm, I'm confused as to what you're asking then.

5. Jul 9, 2008

### rock.freak667

If they say that the surface is frictionless, that means that the frictional force is zero.

6. Jul 9, 2008

### mykoolspam

Ah crap. i think i might have posted the question above the question i actually needed. But k nvm i figured out the answer :) Thanks anyways guys

7. Jul 9, 2008

### jeffreydk

No problem at all.