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A girl coasts down a hill on a sled, reaching a level surface at the bottom with a speed of 7 m/s. The coefficient of kinetic friction between runners and snow is 0.042, and the girl and sled together weigh 764 N. The acceleration of gravity is 9.8 m/s². How far does the sled travel on the level surface before coming to a rest? Answer in units of m.​