一、浮力与杠杆综合例1(2002年长沙市中考题)如图1,杠杆每小格的长度相等,质量不计,以O点为支点,杠杆的右端挂有重物M.支点左边的A处挂钩码时,杠杆平衡.将重物M浸没在水中钩码移到B处,杠杆又平衡.则重物与钩码的质量之比为＿＿解析:,重物M的密度是＿＿千克/米3.解析此题可分为 1. Buoyancy and Leverage Synthesis Example 1 (Changsha City Entrance Examination in 2002) As shown in Figure 1, the length of each grid of the lever is equal, and the quality is not counted. With point O as the fulcrum, the weight is hung on the right end of the lever. M. The left side of the fulcrum is A. At the hook code, the lever is balanced. The weight M is immersed in the water and the code is moved to B. The lever is balanced. The weight of the weight and the weight of the hook code is __Resolved: The density of the weight M is __kg/. m 3. Analysis of this question can be divided into