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Question 30717
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Gravitation: Gravitational Constant G MCQ

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Gravitational Constant GEasyQuestion 30717

Question

The value of G was first measured by:
  1. A
    Newton
  2. B
    Cavendish (torsion balance experiment)
    Correct
  3. C
    Kepler
  4. D
    Galileo

Correct answer

Cavendish (torsion balance experiment)

Explanation

Henry Cavendish (1798) used a torsion balance with lead spheres to measure the tiny gravitational force between known masses, allowing calculation of G = 6.674×10⁻¹¹ N·m²/kg².

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