The radius of curvature of a railway line at a place is 0.8 km. A train is running at 20 metre per second find the elevation of the outer rail over the inner one so that the train may be able to run safely
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Explanation:
tan theta= v^2/(r*g) = 20^2/(800*10)
tan theta = 400/8000 = 1/20
slope = 1:20
the outer rail is 20 times higher than inner rail.
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