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In the equation F = G m₁m₂ / r², the symbol G represents a quantity whose SI value is
A9.8 m s⁻²
B6.674 × 10¹¹ N m² kg⁻²
C5.972 × 10²⁴ kg
D6.674 × 10⁻¹¹ N m² kg⁻²
Answer & Solution
Correct answer: D. 6.674 × 10⁻¹¹ N m² kg⁻²
1. G is the universal gravitational constant in Newton's law of gravitation.
2. Its SI value is 6.674 x 10⁻¹¹ N m² kg⁻².
3. Rule out 9.8 m s⁻²: that is g, the acceleration due to gravity.
4. Rule out 5.972 x 10²⁴ kg: that is the mass of the Earth.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 1 "Laws of Motion", p.16_
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