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Change in speed of satellite

  1. Dec 30, 2016 #1
    a satellite is in circular orbit around the sun. which requires a greater change in speed: the satellite to fall to the sun or to escape the solar system
    2. Relevant equations
    f = gmm/r^2

    3. The attempt at a solution
    Calculated the escape velocity as(2 GM/R)^0.5
    how do i find the speed required so that it falls down to the sun ?
  2. jcsd
  3. Dec 30, 2016 #2


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    Science Advisor
    Homework Helper
    2017 Award

    Hi Rohan,

    Escape velocity is a speed, not a change in speed...
    You didn't use the
    at all !

    What would happen if the satellite speed would be reduced ?
  4. Dec 30, 2016 #3
    if the speed decreases the size of the orbit decreases and it'll eventually fall into the sun ?
  5. Dec 30, 2016 #4


    User Avatar

    Staff: Mentor

    Why does the satellite maintain its distance from the Sun while orbiting?
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