Gravitational force between two masses varies with distance r as:
A. r²
B. r
C. 1/r²
D. 1/r
Answer: Option C
Solution (By JKSSB Mock Tests)
Newton's law: F = Gm₁m₂/r² ⇒ F ∝ 1/r². Inverse square law fundamental to gravitation, electrostatics, and radiation intensity. Memory aid: 'Gravity weakens with square of distance; double distance ⇒ force becomes 1/4'. Core concept frequently tested to verify understanding of fundamental force laws in competitive exams.
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