The force of attraction between two point masses is 10-4N when the distance between them...

JAMB 1998

The force of attraction between two point masses is 10^-4N when the distance between them is 0.18m. If the distance is reduced to 0.06m, calculate the force.

A. 1.1 x 10^-5N
B. 3.3 x 10^-5N
C. 3.0 x 10^-4N
D. 9.0 x 10^-4N

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Correct Answer: Option D

Explanation

F \(\alpha \frac{1}{r^2}\)

therefore, \(\frac{F_1}{F_2}\) = \(\frac{r_1}{(r_2)^2}\)

\(\frac{10^{-4}}{F_2}\) = \(\frac{(0.06)^2}{(0.18)^2}\)

F = 9 x 10^-4N

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