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A fast train has a speed of 111 km/hr. Because its wheels have a limited grip to the railway, the train must not accelerate at more than 0.053g (where g = 9.81 m/s2) while turning, or it will derail. A.What is the smallest radius of curvature for the track that the train can tolerate? B.If there is a curve of radius 1.050 km, what speed must the train mantain to keep the acceleration at the limit?

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