论文部分内容阅读
含有确定第三者的摩擦力试题的特征:题目中有a、b、c三个物体,已知a物体的运动情况,求解的问题是c物体的受力情况.运用传统的隔离法,需要隔离分析多次,画多个受力图,难点的是b物体的运动趋势判定,如果运用反作用力的知识来分析c物体的摩擦力,只需分析b物体对a物体作用力的方向,就能确定c物体的受力情况,下面举例说明.例1如图1所示,在粗糙水平面上放一三角形木块a,当b按下列四种不同方式在不同的斜面上运动时,三角形物体a
Contains a third person to determine the friction test questions features: the title of a, b, c three objects, known a object movement, the problem is to solve the object c force situation. The use of traditional isolation method, you need Quarantine analysis many times, draw a number of force map, the difficulty is b object to determine the trend of movement, if the use of knowledge of reaction force to analyze the friction of c objects, b objects only need to analyze the direction of the force on an object Example 1 As shown in Figure 1, put a triangle on a rough level a, b when the following four different ways in different bevel movement, the triangular objects a