Question a space probe is launched from the earth headed, Ask an Expert

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Question: A space probe is launched from the Earth, headed for deep space. At a distance of 20,000 km from the Earth's center, the gravitational force on it is 1000 N.

Part A: What is the size of the force when it is at each of the following distances from the Earth's center?

(a) 40,000 km;

(b) 60,000 km;

Show how you get the answer, so that I can better understand how to do it.

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