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
- 40.0N
- 20.0N
- 5.0N
-
2.5N
The correct answer is: 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