Question

Object A attracts object B with a gravitational force of 5 newtons from a given distance. If the distance between the two objects is reduced in half, what will be the changed force of attraction between them?

Answer 1

\(F = \dfrac{Gm_1m_2}{d^2} = \dfrac{const }{d^2}\)

\(F d^2 = const\)

\(5 d^2 = F' (\dfrac{d}{2})^2\)

\(F' = 20N\)