作者Timothy0225 (暴食者打我)
看板Physics
標題[問題] 中心力場運動
時間Wed Dec 30 22:59:25 2009
A space craft (m) is designed to dispose of nuclear waste
by crashing into the Sun (M) along an elliptical orbit
with minimum distance R (Sun's radius)
and maximum distance r (radius of Earth's orbit) from the Sun's center
Q:what initial velocity v of the craft relative to Earth is needed ?
題目我是照抄的
請問一下這題的條件是不是少給了一項?
按照題目有辦法找出太空船在近日點 & 遠日點的動能
可是好像沒辦法找出地球在 r 處的動能? (只給r好像沒辦法決定地球的橢圓軌道?)
想請問各位有什麼方法能找出地球在 r 處的動能嗎
還是說我根本就用錯方法了?XD
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