a satellite is revolving in a orbit close to surface of earth with kinetic energy K. When the kinetic energy is increased to nK, the satellite escapes. What is the minimum value of n?
Asked by lakshmananjao
23rd June 2018,
8:52 PM
Answered by Expert
Answer:
When a satellite is orbiting around a planet/earth, its potential energy is negative and its magnatiude is twice of its kinetic energy.
(Please refer NCERT Text book for class XI , part-1 or Resnick & Halliday, volume-1 ).
Hence if kietic energy is K, then potential energy of satellite is -2K so that total energy is negative [ (K-2K) = -K ] and
satellite is bound to the gravitational field due to the planet .
if Total energy becomes zero or greater than zero, satellite escapes. To make the satellite to escape, kinetic energy is increased to n×K so that
total energy = n×K - 2K = 0 , that gives n = 2
Answered by Expert
24th June 2018,
9:59 AM
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