3=at =1.26×102×10=126×1031/s U=R=0.15×1.26×103 =189×102m/s an=R2=0.15×(126×103)2 =238×105m/s2 Ct=R=0.15×1.26×102 =189m/s2 结束目录v=Rω= 0.15×1.26×103 =1.89×102 m/s at = Ra = 0.15×1.26×102 an 2 = Rω = 0.15×(1.26×103) 2 =2.38×105 m/s2 =1.26×102×10=1.26×103 1/s (3) ω =a t =18.9m/s2 结束 目录