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MHT CET202411 May 2024Morning ShiftPhysicsGravitationActual

The acceleration due to gravity at the surface of the planet is same as that at the surface of the earth, but the density of planet is thrice that of the earth. If 'R' is the radius of the earth, the radius of the planet will be

Options

  1. AR 9
  2. BR 3
  3. C3 R
  4. D9 R

Correct answer

B. R 3

Step-by-step solution

g = GM R ^2 = 4 3 R G As, g is same on earth and the planet, array ll & R 1 & R₂ R = 3 & R₂= R 3 array

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