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範例:功能定理與行星運動

如右圖,行星以橢圓形軌道繞太陽S運行,若在距太陽2R之遠日點A時動能為E,近日點B距太陽R,如忽略其他星體的影響,則關於行星繞日,下列敘述何者正確? (A)對太陽而言,行星在A,B兩點之角速率比為1:2 (B)A,B兩點之向心加速度大小比為1:4 (C)A,B兩點之動能比為1:4 (D)A,B兩點的動量大小比為1:1 (E)AB點繞行半週時間內,太陽對其作功3E [84華江]
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