alleryThe gravitational constant G in SI units is approximately
A9.81 m / s²
B6.67 × 10⁻¹¹ N m² / kg²
C3.14 × 10⁸ m / s
D9 × 10⁹ N m² / C²
Answer & Solution
Correct answer: B. 6.67 × 10⁻¹¹ N m² / kg²
1. G is the universal gravitational constant.
2. Its numerical value is 6.674 × 10⁻¹¹ N m² kg⁻².
3. This is different from g (acceleration due to gravity), which varies with location.
4. 9 × 10⁹ N m² C⁻² is Coulomb's constant, not G.
_Source: syllabus Physics, Ch 7 "Gravitation", §7.2_
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