一、本月知识学习指要１．知道力是物体对物体的作用；物体间力的作用是相互的；力可以使物体形变，可以改变物体的运动状态；常用的测量力的工具是弹簧秤，它是根据在测量范围内，弹簧的伸长跟拉力成正比的原理而制成的；物体由于地球吸引而受到的力叫做重力；地面附近的... First, this month’s knowledge study refers to 1. Knowing that force is the effect of an object on an object; the interaction of forces between objects is mutual; the force can deform the object and change the motion of the object; the commonly used tool for measuring force is the spring scale, which is based on the measurement range of the spring. The principle that the extension is proportional to the pull force; the force that the object receives due to the earth’s attraction is called gravity; near the ground...