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A train is moving towards north. At one place it turns towards north-east. Here, we observe that:

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the radius of curvature of the outer and inner rails will be the same

the radius of curvature of one of the rails will be greater

the radius of curvature of outer rail will be greater than that of the inner rail

the radius of curvature of the inner rail will be greater than that of outer rail

answer is A.

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Detailed Solution

Because the train turns towards north-east, the centripetal force acting on the train must be directed towards south east and the centre of curvature must lie on the line of action of the centripetal force . hence option (1) is correct .

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