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一、轻弹簧弹力瞬间变化问题轻弹簧弹力发生作用的瞬间其形变发生改变,但因其形变时间很短,所以在弹力变化瞬间,其形变量可以忽略不计,那么弹力大小和方向变化也可忽略不计,即轻弹簧的弹力瞬间不变。例1如图1所示,三个木块A、B、C叠放在一水平面上,木块A与B用一轻弹簧相连,接触面光滑。已知木块A、B、C的质量之比是1:2:3。则迅速抽掉木块C的瞬间,木块A和B的加
First, the light spring elastic moment of change problem Light spring elastic moment of its deformation changes, but because of its deformation time is very short, so the moment of elastic changes, the deformation can be neglected, then the elastic size and direction can be ignored Excluding, that is, the instantaneous light spring unchanged. Example 1 As shown in Fig. 1, three blocks A, B and C are stacked on a horizontal surface, blocks A and B are connected by a light spring, and the contact surface is smooth. It is known that the mass ratio of wood blocks A, B, C is 1: 2: 3. Then quickly extract the moment of wood C, wood A and B plus