Some important definitions Velocity -Rate of change of displacement is velocity.Velocity can be linear velocity of angular velocity. First order: 出Re=e+Ree+ie do Angular Velocity:@ dt yAImaginary axis dR Linear Velocity:V= R dt Real axis RSome important definitions Velocity - Rate of change of displacement is velocity. Velocity can be linear velocity of angular velocity can be linear velocity of angular velocity. First order: First order: ( ) ( )= d jj j j j R e Re R e j Re R j e dt θ θθ θ θ =+ + θ θ     dt A l V l it dθ Angu lar V e locity: dt ω = Linear Velocity: d dt V = R