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一位学者曾这样说:传统课程是把物理学高高举起,领着学生走进物理学;新课程是要挖掘和发挥物理学的教育价值,捧着物理走近学生,促进学生的发展.教学中,我们应多进行课程研究,重视知识的形成过程,尽可能联系生活实际,巧妙创设合理的情境,想办法让学生理解引入物理概念的动因.“力臂”是杠杆教学中的一个重要物理概念,能同时描述出“力的方向和作用点”两要素对杠杆平衡的影响,它使杠杆的平衡条件如此简约.那么,该如何“教”与“学”呢?
One scholar once said: The traditional curriculum is to lift the physics aloft and lead the students into physics. The new curriculum is to excavate and give full play to the educational value of physics, holding the physics and approaching the students to promote their development In teaching, we should do more course research, pay attention to the formation of knowledge, try to contact with the reality of life as much as possible, create reasonable situations skillfully and find ways to help students understand the motivation for introducing physical concepts. An important physical concept that can simultaneously describe the influence of the two elements of “the direction and point of force” on the leverage equilibrium so that the lever equilibrium conditions are so simple. "?