图2θa图1ABθF图3a图4FBABFA一、利用“相互作用力为零”的临界条件例1如图1所示,木块A、B的质量分别为m1、m2,紧挨着并排放在光滑的水平面上,A与B之间的接触面与水平面成θ角,A与B间的接触面光滑.现施加一个水平力F作用于A,使A、B一起向右运动,且A、B不发生相对运动,求F的最 Fig. 2θa Fig. 1ABθF Fig. 3a Fig. 4 FBABFA 1. Critical condition using “zero interaction force” Example 1 As shown in Fig. 1 , the masses of blocks A and B are m1 and m2, respectively, and they are placed next to each other in a smooth manner. On the horizontal plane, the contact surface between A and B forms an angle θ with the horizontal plane, and the contact surface between A and B is smooth. Now applying a horizontal force F acts on A, so that A and B move together to the right, and A and B do not Relative movement occurs, find the most F