求交点速率的几种方法陆永刚（上海市实验学校，２００２３３）当相交的两根杆相对运动时，交点一般也将移动．交点的移动速率当然与两杆的相对运动有关．下面举例谈谈求交点速率的几种方法．一、利用速度合成求解图１例１如图１所示，Ａ、Ｂ两直杆交角为θ，交点为Ｍ．若... Several methods for finding the intersection rate Lu Yonggang (Shanghai Experimental School, 200233) When the two intersecting rods move relative to each other, the point of intersection generally moves. The speed of the intersection is of course related to the relative motion of the two rods. Here are some examples of ways to determine the intersection rate. First, the use of velocity synthesis solution Figure 1 Example 1 shown in Figure 1, A, B two straight rods intersect θ, the intersection of M. If...