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A tractor pulls a sled of mass M = 1375 kg across level ground. The coefficient of kinetic friction between the sled and the ground is ?k = 0.605. The tractor pulls the sled by a rope that connects to the sled at an angle of ? = 30° above the horizontal. What magnitude of tension in the rope is necessary to move the sled horizontally with an acceleration a = 1.9 m/s2?

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