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两电阻R_1、R_2并联后的总电阻大小计算公式为:R_总=(R_1R_2)/(R_1+R_2)(两量之积除以两量之和).而在整个初中物理内容中,有很多内容的答案与以上公式的样式有惊人的相似之处.一、两半程均速问题这类问题的关键是全程前后两部分的路程要相等,已知这两半路程的平均速度,求全程的平均速度.例1一物体沿直线从点A运动到点B,点
The total resistance of the two resistors R_1 and R_2 in parallel is calculated as: R_ = R_1R_2 / R_1 + R_2 (the sum of the two quantities divided by the two quantities), and in the whole junior middle school physics content, there are A lot of content and the formula above the formula has a striking similarities.A, two and a half the average speed of the problem The key to such problems is the whole journey before and after the two parts of the same distance, known the average speed of the two half-way Average speed of the whole course Example 1 An object moves in a straight line from point A to point B, point