The gravitational pull between two bodies is 20N. Find the gravitational pull when their distance of separation is doubled.
A
10N
B
5N
C
13N
D
20N
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Answer: B. 5N
(F ∝ \(\frac{1}{r^2}\);
doubled r → \(\frac{\text{F}}{4}\) = \(\frac{20}{4}\) = 5 N.)
Source: Myschool Past Questions Archive (Record #74363)