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A huge cannon is assembled on an airless planet having insignificant axial
spin. The planet has a radius of 6 x 106 m and a mass of 4.68 x 1023 kg. The
cannon fires a projectile straight up at 1,532 m/s. An observation satellite
orbits the planet at a height of 953 km. What is the projectile's speed as it
passes the satellite?
[Hint: Be careful with units!]
V=
m/s

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