2.线量与角量的关系 以圆运动为例 =0X v=orsino=OR R 币d dr RoX dt dt =阝×F+O×节 dh 阝×F=β rAIny=BR ar==βR dt 0×v= av sin90=02R 2 =02R R2. 线量与角量的关系 以圆运动为例 v r    = w v = wrsin = wR  x y z R r   b  w  0 dt dr r dt d dt dv a        + w w = = r v     = b + w a  n a  v v R r r R 0 2 sin90 sin w = w = w b  = b  = b     R R v a R dt dv a n 2 2 = = w  = = b  4