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NTA Abhyas JEE Main2020PhysicsGravitationPractice

If the distance between the earth and the sun were half of the present distance, then the duration of a year would have been nearly

Options

  1. A45   d a y s
  2. B100   d a y s
  3. C182   d a y s
  4. D129   d a y s

Correct answer

D. 129   d a y s

Step-by-step solution

According to the Kepler's law T 1 T 2 2 = r 1 r 2 3 ∴ T 2 T 1 = r 2 r 1 3 / 2 ∴ T 2 = T 1 r 2 r 1 3 / 2 = 3 6 5 1 2 3 / 2 = 129 days

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