The magnitude of the gravitational force between two particles 0.10m apart is 10N. If the distance between them is increased to 0.20m, calculate the magnitude of the new force
-
A.
40.0N -
B.
20.0N -
C.
5.0N -
D.
2.5N
Correct Answer: Option D
Explanation
(g_1 = frac{Gm_1m_2}{r^2_1})
(m_1m_2 = frac{gr^2_1}{G})
(g_2 = frac{Ggr^2_1}{Gr^2_2} = frac{10 times 0.1^2}{0.2^2})
= 2.5N