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Railway tracks are banked on curves so that :
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- the train may not fall down inwards.
- the weight of the train may be reduced.
- necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track.
- no frictional force may be produced between the wheels and the track.
- the train may not fall down inwards.
Correct Option: C
A vehicle moving at a fast speed on a straight rail/ road has a large inertia, i.e. tendency to keep moving in the same direction at the same speed. When it takes a circular turn on a curved rail/road, it experiences an additional force, termed as centripetal force, acting towards the centre of the circle. While rounding the curve as the vehicle has tendency to leave curved path and regain straight line path, force of friction between wheels and ground provides necessary centripetal force. In order that the vehicle can go round the curved track at a reasonable speed without skidding, the sufficient centripetal force is managed for it by banking the rail/road.
