用轻杆(不计重力)作为连接体牵引物体,在运动过程中杆与物体相互作用,是较常见的物理模型,对物体的运动、受力、动量和能量等知识点的考查非常全面.一、受力特点杆产生的弹力可能是沿杆方向的拉力和压力,也可能不沿杆方向,由于杆形变较小,可以迅速恢复,弹力会突变.由于被杆牵引的物体往往不只一 Light rod (regardless of gravity) as a connecting body traction objects, the rod in the course of the interaction with the object is a more common physical model of the object’s movement, force, momentum and energy knowledge point test is very comprehensive. , The force characteristics of the rod produced by the elastic force may be along the direction of the rod tension and pressure may not be along the direction of the rod, due to the smaller deformation of the rod, you can quickly recover, the elastic force will change.Because the rod is often more than one