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Question 30676
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Circular Motion: Advanced — Circular Motion of Planet MCQ

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Advanced — Circular Motion of PlanetHardQuestion 30676

Question

Earth's orbital speed around the Sun (~1.5×10¹¹ m, T = 3.15×10⁷ s) is approximately:
  1. A
    29.9 km/s
    Correct
  2. B
    3 km/s
  3. C
    10 km/s
  4. D
    100 km/s

Correct answer

29.9 km/s

Explanation

v = 2πr/T = 2π×1.5×10¹¹/(3.15×10⁷) ≈ 9.42×10¹¹/(3.15×10⁷) ≈ 2.99×10⁴ m/s ≈ 29.9 km/s.

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