∵GMm/(R+h)^2=m(2π/T)^2×(R+h),GMm/R^2=mg,∴gR^2/(R+h)^2=(R+h)×4π^2/T^2,∴T=((R+h)/g)^0.5×2π(R+h)/R,n=t/T=Rtg^0.5/(2π(R+h)^1.5)
直接代入得n=47.7圈
设:圈数为s,t除以T=s ①,v^2/(R+h)=GM/(R+h)^2:4π^2/T^2=GM/(R+h),T=根号4π^2(R+h)/gR^2=2π/R×根号下(R+h)/g,把T带入 ①,则 就算出答案来了!第二问我相信你会算了!