Force between two objects of masses M and m separated by a distance r is given by:
F = GMm/r2
Now according to question,
New distance r' = r/2
⇒So new force between them F' = 4GMm/r2 = 4F
The force increases by factor 4.
How does the gravitational force change between two objects when the distance between them is doubled ?
How much does the force of gravitation between two objects increase when the distance between them is reduced to one-fourth of the initial value?
What will be the coulomb force between two charges, when the distance between them is reduced to half?