1. The problem statement, all variables and given/known data A crate of mass 50.0 kg is pulled across a level concrete floor by a force of 300.0 N acting 30.0 degrees above the horizontal. The crate moves at a constant velocity of 0.962 m/s. What is the force of friction acting on the crate? 2. Relevant equations SINE, COSINE, TANGENT F = ma a = f/m Fnet = F1 + F2 3. The attempt at a solution I'm not sure how the mass and velocity comes into play in this question. Because can't I just find all the sides of the triangle to find the force of friction?