[SOLVED] Newtons Laws Questions Question: A 3 kg block moves up a 40 degrees incline with constant speed under the action of a 26-N force up and parallel to the incline. What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity? Here is what I have done so far: 26 N sin 40 degrees and I got 16.8. However, I think I am doing it wrong. Can someone help me out? Thanks!