NCERT · Class 9 · Science · GravitationThe SI unit of the universal gravitational constant ($G$) is:
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Step-by-Step Solution
According to the universal law of gravitation, $F = G \frac{m_1 m_2}{d^2}$, rearranging for $G$ gives $G = \frac{F \cdot d^2}{m_1 m_2}$. Substituting the units gives $\text{N} \cdot \text{m}^2/\text{kg}^2$ or $\text{N m}^2 \text{kg}^{-2}$.
Detailed Options Breakdown
Option : N m / kg
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Gravitation.
Option 1: N m² / kg² (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: N / kg²
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Gravitation.
Option 3: N m² / kg
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Gravitation.
💡 Study Guide: This question tests core syllabus concepts from Gravitation. For formulas, key summaries, and mock exam reference guides, read the full Gravitation Revision Notes.