Consider a pair of planets for which the distance between them is increased by a factor...
Consider a pair of planets for which the distance between them is increased by a factor of three. Show what happens to the force of attraction between these two planets.
Homework Answers
F = GMm/r^2
r' = 3r
so
F' = GMm/(3r)^2 = GMm/9r^2 = F/9
so Force is decreasedby 9 times
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