If the rocket is to land on the surface of the planet, determine the required free-flight speed it must have at A′ so that the landing occurs at B. How long does it take for the rocket to land, going from A′ to B? The planet has no atmosphere, and its mass is 0.6 times that of the earth.

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A' r = 6 Mm 100 Mm to B 70 Mm- A