*圆周运动 dv a = dt D s d dθ V= (RO)=R dt dt dt dθ dt 0:角速度 dy do R do dt RB dt B dt 1 B:角加速度 a (Ro)-Ro 0 *圆周运动 * t s v d d = t v a d d t = 2 n 1 va ρ = n 2 t d d e v e t v a rrr ρ += β ω = d t d t R d d θ )( = d d R θ t = = R ω t R d d ω = = R β 2 )( 1 R ω R = 2 = R ω R θ s o ω θ = d t d ω : 角速度 β : 角加速度