初步认识、理解力的概念十分重要,这是学好初二物理课程力学部分重要的基础,也是进一步学习必不可少的起点.1　力是物体对物体的作用,物体间力的作用是相互的物理学中力这个概念,来源于实际生活中,例如:人推车,人施了力,车受到了力.不但人能够对物体施力,其他物体也能够对别的 The concept of initial understanding and comprehension is very important, which is an important foundation for learning mechanics of the first two physical courses and an indispensable starting point for further study.1 Force is the effect of the object on the object, and the force of the object is the mutual physical Learning the concept of force, from real life, for example: people cart, people exerted power, the car was a force not only to force the object, other objects can also be other