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A 60000-kg train is being pulled up a 1.0 percent grade (it rises 1.0 m for each horizontal 100 m) by a drawbar pull of 3.0 kN. The friction force opposing the motion of the train is 4.0 kN. The train’s initial speed is 12 m/s. Through what horizontal distance s will the train move before its speed is reduced to 9.0 m/s? |
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