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Given: An object is fired upward with a velocity v0 from the surface of a spherical planet X. When it reaches the maximum height, the acceleration due to gravity at that height is is ¼ the acceleration at the surface. If the escape velocity of the planet=vE=v0[SQRT(N)]. (Ignore energy loss due to atmosphere)
Find: N=? (N can be any number between 1 and 9, inclusively.)

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