怎么用ode45解这个方程组？

1.求解常微分方程并作图():

初始条件: 常数: =9.8; =0.82; =0.25165; =0.0008937; =1000; r=0.095; r2=0.1; rr=0.00168; =(rr/2)^2*; = *(r/2)^2; = *(r2/2)^2;