JAMB - Physics (2025 - No. 17)
The gravitational pull between two bodies is 20N. Find the gravitational pull when their distance of separation is doubled.
10N
5N
13N
20N
ব্যাখ্যা
Answer: B. 5N
(F ∝ \(\frac{1}{r^2}\);
doubled r → \(\frac{\text{F}}{4}\) = \(\frac{20}{4}\) = 5 N.)