å«æçé度为vï¼
å GMm/(3R)²= mv²/3R ----->mv²=GMm/3R ----->å¨è½ T=mv²/2= GMm/6R
å«æçå¼åå¿è½ï¼Ep=-GMm/3R
åå°é度为v0ï¼ææºæ¢°è½å®æï¼mv0²/2-GMm/R=mv²/2-GMm/3R----v0=â5GM/3R
å GMm/(3R)²= mv²/3R ----->mv²=GMm/3R ----->å¨è½ T=mv²/2= GMm/6R
å«æçå¼åå¿è½ï¼Ep=-GMm/3R
åå°é度为v0ï¼ææºæ¢°è½å®æï¼mv0²/2-GMm/R=mv²/2-GMm/3R----v0=â5GM/3R
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