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Mass of person with stuff

  1. Feb 21, 2012 #1
    What I have now if the mass of a human found by this
    m = density x velocity
    which is 189.16lb or 85.79 kg for about 175lb person.
    density = 1010 kg/m3
    volume = 3ft^3
    but then I thought that this guy will have about 200 extra lbs of wight and a parachute along with that. How should I go about putting that into the mass?
    The bag would be about 2ft * 2ft *1ft = 4ft^3 so the
    mass of the pack would be about 200lb roughly?
    and the parachute would be about 50lb too.
    Should I just add the human mass to the other two masses for a total mass? Or am i missing something?
  2. jcsd
  3. Feb 21, 2012 #2


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    Welcome to PF!

    Hi MegaMan64! Welcome to PF! :wink:
    Yes, if they all have the same velocity, it's easier and quicker to treat them as a single mass. :smile:
  4. Feb 21, 2012 #3

    That doesn't lead to the units on the following line in your post...
  5. Feb 21, 2012 #4


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    he meant volume! :rolleyes:
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