质点在均为时间的单值函数主动力作用下的两个力学规律OA

Deduces that when the forces acting on a particle are all single-valued functions of time t and are independent of each other,the specific connotation of the principle of independent action of forces is as follows,the vector sum of the accelerations,velocity increments,and displacement increments produced by each single force acting alone is equal to the acceleration,velocity increment,and displacement increment produced by the resultant force,respectively.It also points out that the essence of this connotation lies in the independence of these vectors.Under the same premise,further deduces that the condition for the so-called"principle of independent action of work"to hold is that the sum of the scalar products between the impulses of each single force is zero;and it presents two typical scenarios.Finally,it is pointed out that inconsistent paths of doing work and inconsistent meanings of force are two reasons why the"principle of independent action of work"generally does not hold.The two mechanical laws deduced in the article may provide some reference for basic mechanics teaching.