means 1. Basic contents. I)Kinematics of a Rectilinear motion Uniform velocity uniformly particle Curvilinear motion accelerated, varying velocity Composite motion: absolute motion, relative motion, embroiling motion 2) Kinematics of a Basic motions translation rigid body 3 Plane motion Rotation about a fixed axis Composite motion: composition of rotations about arallel axes 2. Basic equations: pa 1) Motion of a particle Position vector method r=r(0),I>aA dv d2r a- dt dt rectangular coordinates method x=f1( y=f2() 二=f3(3 1．Basic contents： 1) Kinematics of a particle Rectilinear motion Curvilinear motion Composite motion：absolute motion, relative motion, embroiling motion Uniform velocity. uniformly accelerated , varying velocity 2) Kinematics of a rigid body Basic motions Plane motion Composite motion：composition of rotations about parallel axes translation Rotation about a fixed axis 2．Basic equations: 1) Motion of a particle Position vector method 2 2 ( ) , , dt d r dt dv a dt dr r =r t v = = = rectangular coordinates method ( ) ( ) ( ) 3 2 1 z f t y f t x f t = = = v z v y v x z y x    = = = a z a y a x z y x    = = =