an object with mass m has R distance from the center of the earth. if R=2m, what is the difference between R=2m and 2R?

Question

an object with mass m has R distance from the center of the earth. if R=2m, what is the difference between R=2m and 2R?

Answer 1

If an object is R distance from the center of the Earth (where m = mass), and R = 2m, then 2R = 2(2m) = 4 m.

 

Therefore R - 2R = -R = -2m.  Peculiar problem!