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Problem: Standing on the surface of a small spherical moon whose radius is 2.75 x 105 m and whose mass is 9.00 x 1018 kg, an astronaut throws a rock of mass 2.00 kg straight upward with an initial speed of 45.0 m/s. There is no atmosphere on this moon.

Part A: What maximum height above the surface of the moon will the rock reach?

I need help to find what maximum height above the surface of the moon the rock will reach.

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