Correct Answer: Option C

Explanation

Gravitational force Fg = \(\frac{Gm_1m_2}{r^2}\)

Fg = 10N

distance = \(\frac{r}{2}\)

F'g =  \(\frac{Gm_1m_2}{(\frac{r}{2})^2}\) = 4 (\(\frac{Gm_1m_2}{r^2}\)) = 4Fg = 4 x 10 = 40N

There is an explanation video available below.

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