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Gaokao Physics Practice Question

假设地球可视为质量均匀分布的球体, 已知地球表面重力加速度在 两极的大小为 $\mathrm{g}_{0}$, 赤道的大小为 $\mathrm{g}$; 地球自转的周期为 $\mathrm{T}$, 引力常量为 G. 则地球的密度为

  1. A.$\frac{3 \pi}{G T^{2}} \frac{g_{0}-g}{g_{0}}$
  2. B.$\frac{3 \pi}{GT^{2}} \frac{g_{0}}{g_{0}-g}$
  3. C.$\frac{3 \pi}{G T^{2}}$
  4. D.$\frac{3 \pi}{G T^{2}} \frac{g_{0}}{g}$

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