这是一道有关动能定理应用的常见例题,许多教师都用来介绍整体思维在动能定理中的巧妙使用.例如图1所示,在离地高h=4 m处的定滑轮上,用不能伸长的细绳悬挂两物体,质量分别为m_1=1 kg,m_2=2 kg,开始时细绳 This is a common example of the application of kinetic energy theorem, many teachers are used to introduce the overall thinking of the clever use of kinetic energy theorem.For example, as shown in Figure 1, h = 4m off the ground at the fixed pulley, can not stretch Long string hanging two objects, the quality of m_1 = 1 kg, m_2 = 2 kg, the beginning of the string