摘要
功和动能定理在求解相关的物理问题时有着重要作用.在不同的参考系中计算的功值是不相同的.其差值决定于运动物体在这一运动过程中的动量增量与两系相对速度的乘积.在不同的惯性系中质点的动能定理有着相同的形式.质点系内力所作的功在不同的惯性系中也是相等的.其功值的大小与参考系的选择无关.在非惯性系中应用动能定理应当考虑惯性力所作的功,结论才是正确的.
Work and the Theorem of Kinetic Energy play an important role in solving the problem of related physics problems, The value of work varies in different framework of reference. The values are determined by the product of the increasing amount of the momentum and the relative speed in the two reference frameworks of the object in the process of motion. The Theorem of Kinetic Energy of the particles take the same form in different intertial system, and so is the works produced by the internal power, The value of work is irrelevant to the choice of reference framework. It is correct only in case that the work produced by the inertial power is taken into account when the Theorem of Kinetic Energy is applied in the non-inertial system.
出处
《商丘师范学院学报》
CAS
2005年第5期167-169,共3页
Journal of Shangqiu Normal University
关键词
不同参考系
功
动能定理
different frameworks of reference
work
the theorem of kinetic energy
