When t = 0, the train has a speed of 8 m/s, which is increasing at 0.5

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When t = 0, the train has a speed of 8 m/s, which is increasing at 0.5 m/s2. Determine the magnitude of the acceleration of the engine when it reaches point A, at t = 20 s. Here the radius of curvature of the tracks is ρA = 400 m.

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