Answer:
r = √(GMm/F)
Step-by-step explanation:
F = GMm/r²
We can make r the subject of the above equation as follow:
F = GMm/r²
Cross multiply:
F × r² = GMm
Divide both side by F
r² = GMm/F
Take the square root of both side
r = √(GMm/F)
Thus, r is √(GMm/F)