力是改变物体运动状态的原因.物体在恒力作用下的曲线运动,通常可以分解为互相垂直的两个方向的分运动,如研究平抛运动、斜上抛运动等.笔者在教学中发现,当处理涉及物体在变力作用下的连接体运动问题时,有的同学由于对实际运动不会分解而束手无策,也有的同学由于把实际运 Force is to change the object movement state of the object under the constant force of the curve of the movement can usually be divided into two perpendicular to each other in the sub-movement, such as the study of flat throwing throwing throwing throwing motion, etc. I found in teaching , When dealing with the object involved in the movement of the connector under the effect of variable force, some students because of the actual exercise will not be able to break down, and some students due to the actual operation