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Most Important Selected Qs for JEE AdvancedPhysicsGravitation

A particle is launched from a height 8 R above the surface of earth and it is given a speed G M 8 R parallel to the surface then

Options

  1. AIt will escape fro the gravitational field of earth.
  2. Bit will follow a circular orbit.
  3. Cit will follow an elliptical orbit.
  4. Dthe point of launching will be the perigee of its orbit

Correct answer

D. the point of launching will be the perigee of its orbit

Step-by-step solution

Speed is more than the orbital but less than the escape velocity therefore an orbit will form. The speed is perpendicular to the radius. It must be either an apogee or a perigee. But since the speed will be increasing, the launch point must be the perigee.

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