[問題] 一題普物
Imagine a planet of mass M with a small moon of mass m and radius a
orbiting it and keeping the same face toward it.If the moon now
approaches the planet.there will be a critical distance from the
planet's center at which loose material lying on the moon's surface
will be lifted off.Show that this distance is given by r=a(3M/m)^(1/3).
這題是在講當月球一直靠進行星到某個距離時,表面上的物質會開始脫離,應該是因為
地球的萬有引力和月球的萬有引力互相抵消了使得向心力不足?
想了一整天都想不出來,對地球同一面的條件也不會用
懇請大大出手相助吧QQ
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