A model train of mass 0.5 kg is placed at one end of a straight 3-m electric
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A model train of mass 0.5 kg is placed at one end of a straight 3-m electric track. Assume that a force F(x) = (3x − x2) N acts on the train at distance x along the track. Use the Work-Energy Theorem (Exercise 39) to determine the velocity of the train when it reaches the end of the track.
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