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Gaokao Physics Practice Question

5. (6 分) 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 $g_{0}$, 赤道的大小为 $g$; 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.$\frac{3 \pi g_{0}-g}{G T^{2} g_{0}}$
  2. B.$\frac{3 \pi g_{0}}{G T^{2} g_{0}-g}$
  3. C.$\frac{3 \pi}{\mathrm{GT}^{2}}$
  4. D.$\frac{3 \pi g_{0}}{G T^{2} g}$

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