What is the gravitational force of Superman's second orbit in this hypothetical problem?

Superman circles the earth at a radius of 2r where r is the radius of the earth. He then moves to another orbit of radius 4r. The gravitational force of him in this second orbit as compared to the first one is how much?





Please also show me HOW you solved this problem. Thanks|||1/4.


Just look at the gravitational force formula: F = Gm1m2/r^2. Force is inversely proportional to r^2. If r doubles, as in this case, F decreases by a factor of 4.|||Thanks for the feedback.

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