Finding static force and kinetic force

[tallbus1]

Homework Statement

A 4.00 kg block is pushed along the ceiling with aconstant applied force of 85 N that acts at an angle of 55 degrees with the horizontal. The block accelerates to the right at 6.00 m/s2. Determine the coefficient of kinetic force between the block and cieling

Homework Equations

No idea!

The Attempt at a Solution

Again, no idea

Our physics class has been without a degreed teacher since the beginning of the school year and there are serious holes in our classes learning yet we are expected to be learning at the pace of other classes, while this is hardly an excuse I could use some help on this problem.

 

[willem2]

draw a free body diagram.
split all forces in horizontal and vertical components, you have F = ma in both directions.