Kinematics 86-2 Description of the motion of a particle using rectangular coordinates 1. Equation of motion trajectory(path) r=xit y1+ ck M(x,y,z) 2. Velocity of a particle dr dx V dt +k .v=vxi+vj+v k x p +1,+1 ∧ COS( vi= coS vj) coS( vk)= 1
11 1. Equation of motion, trajectory (path) 2.Velocity of a particle r xi yj zk k dt dz j dt dy i dt dx dt d r v v v i v j v k x y z 2 z 2 y 2 x v v v v v v v i x cos( ) v v v j y cos( ) v v v k z cos( ) §6-2 Description of the motion of a particle using rectangular coordinates
远动 §6-2点的运动的直角坐标法 一.运动方程轨迹 r=xi+yj+zk 点的速度 M(x,y,z) d=}+如万+生k t ∴V=vxi+,+vk x y=1,2+n2+n2 ∧ cos( vi)=x coS( vj)=y cos(vk)==2 12
12 一.运动方程轨迹 二.点的速度 r xi yj zk k dt dz j dt dy i dt dx dt d r v v v i v j v k x y z 2 z 2 y 2 x v v v v v v v i x cos( ) v v v j y cos( ) v v v k z cos( ) §6-2 点的运动的直角坐标法