Solving Inclined Plane Motion: Find Force for Acceleration

[Ockonal]

Homework Statement

There is inclined, smooth plane whish is sloped with angle 30 degrees. Some objects moves on it. The attraction power is 17 Newtons. Find the force which gives acceleration for the body.

Homework Equations

F = m×a;
F_attraction = m×g;
L = 30⁰;
F_friction = u×N;

The Attempt at a Solution

X: ma = N×cos(L) + F - F_friction
Y: 0 = F_attraction×sin(L) + N

Now I'm "freezed"
What to do?

 

[Apphysicist]

http://i115.photobucket.com/albums/n283/Baryon/General Physics/Inclined_Coordinate_System.jpg

I'm assuming that's an accurate representation of the plane you've described? And that you're making an attempt to keep your coordinate system in that fashion (x-along the incline, y-perpendicular to the incline)?

In the problem, it says you have a "smooth plane," which to me suggests "frictionless."

Try drawing the free-body-diagram to make sure that you have your component vectors correct; that is, make sure your sines and cosines are indeed where they need to be so that you can sum the forces in either direction accurately.