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火车启动时，车轮与钢轨间的摩擦力是有益还是有害的

2025-03-15 01:36:57

推荐回答（2个）

回答1：

有利啊,轮轨摩擦可是火车能够启动的前提条件啊,想象一个车头能拉几百吨货物风驰电掣,就靠车头那十几个轮子的摩擦发力的,如果摩擦力不够比如铁轨上有冰层,那车头就会发生打滑,火车启动就会遇到困难.但是,如果车厢(也就是非传动的车轮)的轮轨摩擦。

回答2：

对于车头来说
该摩擦力是有益的
因为该摩擦会提供前进的动力
但是车厢的摩擦力是有害的
他会阻止火车运动

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