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Most Important Selected Qs for JEE AdvancedPhysicsGravitation

Paragraph: A satellite is moving around earth (mass M, Radius R ) in circular orbit of radius 2 R in equatorial plane. Question: A particle is projected from this satellite radially outward relative to satellite with speed u . Find the minimum value of u so that particle escape from the gravitational force of earth. (Mass of earth >>> mass of satellite >>> mass of particle)

Options

  1. AGM R
  2. BG M 2 R
  3. C2 GM R
  4. D2 G M R

Correct answer

B. G M 2 R

Step-by-step solution

1 2 m u₁^2- G M m 2 R =0v₁= G M R GM 2 R + u ^2= GM R v= GM 2 R Ans. (B)

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