“将被测物体轻轻挂在弹簧秤下 ,待物体静止不动时 ,弹簧秤的示数就是重力的大小 .”只要学过初二“力学”的学生都知道这种测重力的方法 ,但很少有学生去追究这种测量的原理 .久而久之 ,不但不知道测量原理 ,甚至出现一些错误的认识和说法 .典型的有“将物体悬挂在弹簧秤下静? “The object to be measured is gently hung under the spring balance. When the object is still, the scale of the spring scale is the size of gravity.” As long as students who have studied the second two “mechanics” know this method of measuring gravity, but it is Few students have to investigate the principle of this measurement. Over time, not only do not know the principle of measurement, and even some misunderstandings and claims. Typical is "suspended objects hanging under a spring balance static?