Estimating the ratio of acceleration of gravity


Consider two planets with radius r1 and r2 are made from the same material so have the same density. What is the ratio of the acceleration of gravity (g1/g2) at the surface of these two planets?

A. ,r2/r1

B. ,(r2/r1)^5

C. , (r1/r2)^2

D. ,r1/r2

E. ,(r2/r1)^2

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Physics: Estimating the ratio of acceleration of gravity
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