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Phobos is a small moon of Mars.  It has a mass of M=5.8 10^15 kg and a radius of R=7.5 10^3 m.  For the purpose of the following problem, assume that Phobos has the shape of a uniform sphere and that it is initially at rest.  Suppose a meteorite strikes Phobos at distance d=5 10^3 m off center and embeds itself inside Phobos, close to its surface,  If the meteorite mass was m=3 10^8 kg and its speed was v=1.5 10^5 m/s, what is the angular velocity of Phobos about its axis of rotation after the collision? 

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