1.∫ [0,v0] Kv^3*dv=Kv0^4/4=1∴K=4/v0^42.∫ [0,v0] Kv^3*v*dv=Kv0^5/5=4v0/53.∫ [0,v1] Kv^3*dv=Kv1^4/4=(v1/v0)^4=1/16∴v1=v0/2很基础的题目啊
电视里放看看
题目呢- -
