Hello, I am stuck on this question, I don't understand what to do. Any help would be great! I know that I have to use Newton's Second Law in the x and y directions. Greezy is pushing a very large crate of 50 kg across the floor at a constant velocity with a force of 200N. He is pushing on the crate upwards at an angle of 20 degrees. What is the coefficient of kinetic friction between the ground and the create? I don't understand what to do with that angle that is upwards? Thanks again!