1986年上海市普通高校招生物理试题第四题第1小题考查的内容是“有固定转动轴物体的平衡条件”。题目的后半部分是这样的: “根据平衡条件,测力计与圆盘连线上的拉力T应该是____千克力。但该学生发现测力计的读数与该值有偏差,除摩擦等原因外,从所示的图1(a)、(b)中可看出引起误差的原因是____”。 In 1986, the first item of the fourth quiz on the physical examination questions for Shanghai’s ordinary colleges and universities was “The balance condition of objects with fixed axes.” The second half of the title is this: “According to the equilibrium conditions, the tension force on the dynamometer and the disc wire should be ____kilograms. But the student found that the dynamometer’s reading was different from this value. In addition to friction and other reasons, it can be seen from Figure 1 (a), (b) shown that the cause of the error is ____”.