悬链线是一种常见的曲线形状.我们平时所见的搭挂在相距一段距离两个钉子上的绳子,其形状就构成了悬链线.悬链线看似简单,但描述它的数学式却较为复杂,故在中学阶段的物理问题中很少研讨.即使有些问题中有所涉及,一般也将其作了简化近似(如将拉紧绳索的形状视作直线等),而直接利用数学式及其性质解悬链线问题的不多.新一轮高中物理课程改革,明确提出了要“关注生活中的物理”.如果在我们物理教学 The catenary is a common curve shape. The rope that we usually see hangs on two nails at a distance from each other, the shape of which constitutes the catenary. The catenary seems simple but describes its mathematics. The formula is more complicated, so it is rarely studied in the physics problems in the secondary school. Even if some problems are involved, they are generally simplified and approximated (such as the shape of the rope will be tightened as a straight line, etc.) and used directly. Mathematical formulae and their properties solve the problem of the catenary problem. A new round of high school physics curriculum reforms clearly puts forward the need to pay attention to the physics in life. If we teach in physics