论文部分内容阅读
〔一〕高中课本“§65功”的开头第一句写道:“在我们推动小车、举起重物、把钉子钉进木头里或者把弹簧拉长的时候,我们就做了机械功,或者简单地说,做了功.”在这以前,根本没有讲过“做功”是什么意思,而突然毫无根据地使用起这一术语来.学生有充分的理由可以问道:“倒底什么是做功呢?请你先讲清楚什么是做功,然后我才能考虑推动小车以及把钉子钉进木头里时是否做了功.”在这时教师也不能以初中已经学过功的概念为理由进行搪塞,因为初中课
The first sentence at the beginning of the high school textbook “§65 function” wrote: “When we drove the car, lifted a heavy object, nailed it into the wood, or lengthened the spring, we did Mechanical work, or simply, done work.”Before this, did not say what “do work ” mean, and suddenly uselessly used this term. Students have a good reason to ask Dao: “What is the work done? Please explain clearly what work is done. Then I can consider whether or not to push the car and nail it into the wood.” “At this time, the teacher can’t use junior high school already.” The concept of learning too much work for reasons of congestion, because junior high school class