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MHT CET202019 Oct 2020Morning ShiftPhysicsGravitationActual

Two satellites 'A' and 'B' of same mass are revolving round the earth at height '2R' and '3R' respectively above the surface of the earth. The ratio of kinetic energies of A to B will be

Options

  1. A3: 2
  2. B3: 4
  3. C2: 3
  4. D4: 3

Correct answer

D. 4: 3

Step-by-step solution

(B) aligned K.E. &= 1 2 GMm r K ₁ ~K ₂ &= r ₂ r ₁ &= 3 R + R 3 R + R = 4 3 aligned

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