看到《物理教学》1990年第5期“生活与物理”栏内有一篇文章《汽车上、下坡有最大倾角吗?》,感到这是一个非常有实际意义的问题,也想来谈一谈。汽车是依靠自己内部机件前进(以及刹车)的,不是靠外力的推拉或单靠重力运动的,这是分析这个问题的关键所在。汽车用其内部的非 Seeing that there is an article in the column “Life and Physics” in the “Physics Education,” No. 5, 1990, “Is the maximum inclination of the car up and downhill?”, I feel that this is a very practical issue and I also want to talk about it. Talk about it. Cars rely on their own internal parts to advance (and brake), not relying on pushing or pulling by external forces or relying solely on gravity. This is the key to analyzing this issue. The car uses its internal non