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Q. |
Railway tracks are banked on curves so that : |
A. | the train may not fall down inwards. |
B. | the weight of the train may be reduced. |
C. | necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track. |
D. | no frictional force may be produced between the wheels and the track. |
Answer» C. necessary centripetal force may be obtained from the horizontal component of the normal reaction due to track. | |
Explanation: 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. |
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