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Manipal MET2021PhysicsGravitation

The ratio of KE required to be given to the satellite to escape earth's gravitational field to the KE required to be given, so that the satellite moves in a circular orbit just above earth's atmosphere is :

Options

  1. A1
  2. B1 / 2
  3. C2
  4. Dinfinity

Correct answer

C. 2

Step-by-step solution

v_e= 2 g R and v_o= g R KE ₁ KE ₂ = 1 2 m v_e^2 1 2 m v_o^2 = v_ ^2 v_o^2 =2

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