Block on an incline with Friction

[love2dream89]

Homework Statement

A block with a mass of m = 2.29 kg is at rest on an incline. The angle of the incline is θ = 15.9° with respect to the horizontal. The coefficient of static friction between the object and the incline is μs = 0.579, the coefficient of kinetic friction is μk = 0.389.

What would be the magnitude of the object's acceleration after an initial impulse set it in motion uphill on the incline?

Homework Equations

Newtons Second Law
F= ma
??

The Attempt at a Solution

[-(coefficient k)mg-mgsin(theta)]/m and then making that answer positive because it is a magnitude. Where am I going wrong here?

 

[Dick]

You probably aren't actually drawing a force diagram. The frictional force is proportional to the normal force, which isn't mg. The normal force depends on the angle too.