１设计启发如图１，甲图中弹簧测力计的读数是物体的重量G，乙图中弹簧测力计的读数是F’，甲图弹簧与乙图中弹簧对比，乙图中弹簧缩短了△x，引起变化的原因是由于重物在水中受到了水的浮力的作用，弹簧缩短的量越大，受到的浮力就越大，因此，只要看弹簧变化量的大小，就能判 1 The design inspiration is shown in Fig. 1. The reading of the spring dynamometer in figure A is the weight of the object G, the reading of the spring dynamometer in figure B is F’, the spring of figure A is compared with the spring in figure B, and the spring in figure B is shortened. △x, the cause of the change is due to the heavy object in the water by the buoyancy of the water, the greater the amount of shortening the spring, the greater the buoyancy received, so just look at the size of the spring change, can be judged