Gravitation · JEE Main previous year questions

2016 1 question

1. Q342016 · 3 Apr 2016 · Shift 1

   A satellite is revolving in a circular orbit at a height '$h$' from the earth's surface (radius of earth $R$; $h\ll R$). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth's gravitational field, is close to : (Neglect the effect of atmosphere.)

   1. A.$\sqrt{2gR}$
   2. B.$\sqrt{gR}$
   3. C.$\sqrt{gR/2}$
   4. D.$\sqrt{gR}(\sqrt{2}-1)$
   Show answer

   Answer: D