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MHT CET202615 April 2026Evening ShiftPhysicsGravitationActual

The distance of the two planets A and B from the sun are ' r_A ' and ' r_B ' respectively such that r_B = 100 , r_A . The ratio of the speed of planet A to that of planet B is (both the planets are revolving around the sun)

Options

  1. A1 10
  2. B10
  3. C10
  4. D10 10

Correct answer

C. 10

Step-by-step solution

The orbital speed of a planet revolving around the sun is given by v = GM r . This implies v 1 r . The ratio of the speed of planet A to that of planet B is v_A v_B = r_B r_A Given r_B = 100 r_A , substituting this value gives v_A v_B = 100 r_A r_A = 100 = 10 Answer: 10

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