1. The problem statement, all variables and given/known data A 1.20 x 102 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.450. What should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero? 2. Relevant equations W = FD 3. The attempt at a solution I set the work done by friction 1200 x 9.8 x .450 x D equal to the work done by P which is P x cos 30 x D. I then canceled D out of both sides, and solved for P, and got 611.068 N. What did I do wrong?