论力矩定量定义的逻辑起点

The Logical Starting Point of The Fixed Quantity and Defination of Moment of Force

以力的功为逻辑起点，通过对质点绕定点转动问题的讨论，引入力矩的定量定义。

In this paper,we will take force’s work as the logical starting point to discuss the problem that particle turns round a fixed point,so that we can draw forth the fixed quantity and definition of moment of force.