论文部分内容阅读
热学板块的能量问题，概念十分抽象，是学习的一个难点，初学者极易因概念上的模糊导致错误．打破并走出误区的关键就是澄清概念．一、动能和势能转化时，此增彼减，彼此的改变量相等辨析：动能和势能的相互转化，此增彼减，但要守恒就要有条件：物体没有对其他物体做功，其他物体也没有对该物体做功，同时没有机械能和其他形式的能的相互转化．一句话，机械能既没有转移，也没有和其他形式能的转化．例如，不计空气阻力，物体从高处下落；物体沿光滑斜面下滑等．
The energy problem of the thermal plate, the concept is very abstract, is a difficult point of learning, beginners can easily lead to errors due to the conceptual ambiguity. The key to breaking and getting out of the wrong area is to clarify the concept. First, when the kinetic energy and potential energy are transformed, the increase and decrease will be equal to each other’s change. Analysis: The mutual transformation of kinetic energy and potential energy will increase and decrease. However, conservation must be conditional: objects do not perform work on other objects, and other objects also There is no work done on the object, and there is no mutual conversion of mechanical energy and other forms of energy. In a word, mechanical energy has neither transferred nor transformed with other forms of energy. For example, without the air resistance, the object falls from a height; the object slides along a smooth slope.