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解答力矩平衡的问题,转动轴的选取至关重要.转轴选得巧,不仅问题可以顺利得解;而且过程简捷;选得不好,解法繁琐,甚至得不到结果.一个物体的转动,在很多情况下,既可认为绕某一个轴,也可视作绕其他轴.而且当物体处于平衡状态时.不论取那根转轴,所有力矩的代数和都为零(∑M=0).这就为解题时巧妙选取转轴提供了依据.解答力矩平衡问题的技巧性.在于不违背实际情况
To solve the problem of balancing the moment, the selection of the rotating axis is crucial. The selection of the rotating axis is very clever. Not only can the problem be solved successfully, but also the process is simple; the selection is not good, the solution is cumbersome, and even results are not obtained. The rotation of an object is In many cases, it can be considered that one axis can be considered around another axis. When the object is in equilibrium, the algebraic sum of all the moments is zero (∑M=0). The clever selection of the axis for solving the problem provides a basis for solving the problem of the balance of the torque skill. It does not violate the actual situation.