Chapter 2&3 Kinematics 3 Particle(质点):P16 个具有质量而没有大小和形状的理想物体。 突出了质量和位置 Every portion of object moves in the same direction and the same rate It has only translational motion(平移运动)Chapter 2&3 Kinematics 一个具有质量而没有大小和形状的理想物体。 突出了质量和位置。 Every portion of object moves in the same direction and the same rate. 3 Particle (质点): P16 It has only translational motion (平移运动)