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Jumping perpendicular out of a fast spaceship will retain your speed right?

  1. Jan 5, 2012 #1
    If u stand on top of a spaceship, u will not be thrust backward?
    U only do on top of an airplane cuz of air resistance?
    So if u jump up out of a horizontally moving spaceship, after you jump out you are moving with the same horizontal speed as you were inside the spaceship? U just have to thrust downwards to get back?
     
  2. jcsd
  3. Jan 5, 2012 #2

    rcgldr

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    Or use a tethered line to get back. There were four untethered space shuttle space walks where a thruster pack was used to allow the astronaut to move around.

    http://en.wikipedia.org/wiki/Extra-vehicular_activity
     
  4. Jan 5, 2012 #3
    Yes, that is exactly correct. Thinking about space dynamics is the best way to understand F=ma. You will continue to have the same velocity until acted on by some outside force (jetpack, tethered line). Its a bit hard to fully grasp here on earth, because we are constantly acted upon by various forces. (Gravity, pressure, wind resistance, etc.)
     
  5. Jan 5, 2012 #4
    1 - Top?

    2 - Air resistance [STRIKE]and gravity[/STRIKE]

    3 - Yes

    4 - Down?
     
  6. Jan 5, 2012 #5
    Mother nature did not endow ur spaceship witth the gift of absolute rest, so yes, relative to the ships frame you will go 0 mph after jumping out of it.
     
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