车子之所以会前进,靠的是轮胎与地面间的摩擦力,没有摩擦力车子就无法前进.而轮胎的表面都有花纹,这些花纹不是为了好看而是有它的作用的.轮胎上的花纹的主要作用是压挤路面上的水,使橡胶与地面接触而产生摩擦力,以“抓住”地面.如果轮胎与地面间的水不能被及时排出,汽车就像浮 The reason why the car will advance, relying on the friction between the tire and the ground, the car can not move without friction. And the tire surface patterns, these patterns are not for good but have its role. ’S main role is to squeeze the water on the pavement, so that the rubber contact with the ground and produce friction to “catch” the ground.If the tire and the ground between the water can not be discharged in time, the car is floating