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本刊1991年第6期刊登了《如何正确求解运动的合成与分解问题》,该文在“例析”中说“绳上各点速度大小相等”,“绳子中的速度为分速度”.笔者对此谈点不同看法. 结合原文例1“如图1所示,已知汽车通过B点时速度为v_B、绳与水平方向夹角为a,则被吊重物此时速度v多
In the 6th issue of the magazine, “How to Solve the Problem of Synthesizing and Decomposing a Sport” in the 6th issue of the magazine, this article states in the “Example Analysis” that “the speed of each point on the rope is equal” and “the speed in the rope is the speed of the division.” The author talks about different views. Combined with the original example 1 “As shown in Fig. 1, it is known that when the car passes point B, the speed is v_B, and the angle between the rope and the horizontal direction is a, then the weight is lifted by the weight at this time.