A 60 000-kg train is being dragged along a straight line up a 1.0 percent grade (i.e., the road rises 1.0 m for each 100 m traveled horizontally) by a steady drawbar pull of 3.0 kN parallel to the incline. The friction force opposing the motion of the train is 4.0 kN. The train’s initial speed is 12 m/s. Through what distance s will the train move along its tracks before its speed is reduced to 9.0 m/s? Use energy considerations.