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如图1所示,台秤上放一容器,容器内装有水,水中浮一质量为m、体积为V的小球。将小球的一端用细线与容器底部相连,容器、水及小球总质量为M,若弄断细线,浮球在上升过程中,台秤读数怎样变化? 对于这一问题,出现了不同的解法和不同的结果,有人认为弄断细线后,台秤读数变大,也有人认为变小,有人认为水的阻力对结果无影响,也有的持反对意见。我对这一问题从实验上进行了观察、研究,实验中,台秤量程为5公斤,容器是直径为10cm,高
As shown in Figure 1, a container is placed on the platform scale, and the container is filled with water. A ball with a mass of m and a volume of V floats in the water. Connect one end of the ball to the bottom of the container with a thin line. The total mass of the container, water, and ball is M. If the thin line is broken, how does the reading of the scale change during the ascent of the float? For this problem, there is a difference. The solution and different results, some people think that after breaking the thin line, the scale readings become larger, some people think that smaller, some people think that water resistance has no effect on the results, and some opponents. I have observed and studied this issue experimentally. In the experiment, the bench scale has a measuring range of 5 kg and the container is 10 cm in diameter and high.