A train is moving towards north. At one ...

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

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

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

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

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

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The correct Answer is:

Because in horizontal direction remains constant during whole journey because there is no acceleration in this that of inner all.

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