Total mass of a train is 25 tonne. This train travels around a horizontal curved track of radius 200m at a speed of 70 km/h. Calculate the horizontal force acting on the rails. a) 65851 KN b) 25625 MN c) 47239.2 N d) 32515.5 N

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!