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使用“元功法”和“微分法”对两个静力学问题进行了求解。使用元功法,充分利用力、功和能三者之间的关系,可以非常简洁地计算出相关力的大小。而使用微分法是直接通过受力分析计算了相关力的大小,除了涉及微积分计算外,计算本身并不复杂;更加重要的是它给出了此类静力学问题的物理本质——一个物体无穷多个受力点受力的求和(积分)。这两个方法相辅形成,有助于加深学生对静力学问题求解的理解,拓宽学生的解题思路。
Solve two statics problems using “Yuan Gong ” and “Differential ”. The use of Yuan Gong method, make full use of the relationship between strength, energy and energy, can be very succinctly calculate the size of the relevant force. The use of differential method is directly through the force analysis to calculate the size of the correlation force, in addition to involving calculus, the calculation itself is not complicated; more importantly, it gives the physical nature of such static problems - an object An infinite number of stress points summation (points). The two methods complement each other and help to deepen students ’understanding of solving static problems and broaden students’ thinking of solving problems.