You have often seen how fast a train runs on the tracks and even sometimes the train has to take sharp turns. Moreover, the train also keeps changing the tracks, but despite all this, why does the train never fall off its tracks? Basically, two major reasons can be attributed to this: so let's try to understand them.
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The first reason is that the wheels of the train are always designed in a slightly semi-conical shape, that is, they are narrower on the outside than they are on the inside, due to which these wheels help the train to stay on the tracks at all times. And when the train turns, the conical wheels allow the train to tilt to stay on the tracks. Meaning when the first wheel slips to the other side, then the second wheel exerts a force on the first wheel and pushes it back to the right position, this is what keeps the train's wheels at the right place on the tracks. Also, a thick flange, or raised edge, is fitted on the inner side of both wheels which never allows the wheels to slide off the tracks.
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The second reason is that the width between the train tracks and the width of the train axle is always the same. The axle is a metal rod with which the wheels on each side of a train are connected. From time to time the railroad trackmen keep on checking the tracks and correcting the distance between the tracks so that the train never leaves its tracks.
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