What is the Range of Mass m2 to Keep the System Stationary on a Bended Plane?

[Ivanperez]

In the showen figure the mass of block m1 is 2kg and the static and kinesthetic friction coefficients of this block with the bended plane are 0.3 and 0.2
If the system is in rest state,find the range of the values that m2 can take for the system not to move
http://img513.imageshack.us/img513/3113/fisfl9.png
I really don't know how to get in an inequality

 

[PhanthomJay]

If the system is not moving, that should give you a hint as to which friction coefficient to use. Note that if m2 is not heavy enough, then m1 will slide down the plane; if m2 is too heavy, m1 will slide up the plane. You've got to look at those 2 extremes to get a range. Draw good free body diagrams, and note carefully the direction of all the forces acting on each mass.