can someone help to these twoproblems about gravity ?/board:29-101-

[Memory]

1.Determine the potential of the gravitational field at height 32400km. The radius of the Earth taken 6200km

2.Two objects of the same mass are situated in diametrically opposite points of Earth’s surface to achieve the time to reach the Moon. These objects belong to the centers of the mentioned celestial bodies. Which of the objects weighs more?

[Memory]

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