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Suppose there is a planet whose diameter is half that of the Earth and whose mass...

Suppose there is a planet whose diameter is half that of the Earth and whose mass is twice that of the Earth. What is the weight of a 100 kg person on this planet? Hint: Using Newton’s law of Universal Gravitation, obtain an expression for the acceleration due to gravity (~gplanet) on the surface of this planet.

I understand that the answer is (8)(9.8)(100) but where did the 8 come from?

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SOLUTIONArcoting to the nnesion Haus of enr panet o be 0, f 02M) on eatlh plane person on planet m)g< eig)

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