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Change weight to a force?

  1. Jan 6, 2013 #1
    dss

    1. The problem statement, all variables and given/known data
    In Rendezvous with Rama, they are on rung 700, so about 213 m down into the ship. The gravity is very small. It says that they weigh 10 kg in that gravity. So what gravity are they in?

    2. Relevant equations

    I know I use w=ma, but how do I get the 10 kg into N? I guessed that an average male weighs 72.5 kg

    3. The attempt at a solution

    I tried doing 10=72.5a
    a=.13

    But I know that weight needs to be in N, but I'm confusing myself as to how to do that in an unknown gravity.

    Edit: post restored after being deleted by OP
     
    Last edited by a moderator: Jan 7, 2013
  2. jcsd
  3. Jan 6, 2013 #2

    haruspex

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    When it says they weigh 10kg, it means that the force of gravity on them is the same as for a 10kg mass in Earth's surface gravity, i.e. 10g N.
     
  4. Jan 6, 2013 #3
    So you're saying I'd do:
    10kg * 10 (gravity on Earth)=72.5a ??
     
    Last edited by a moderator: Jan 7, 2013
  5. Jan 6, 2013 #4

    haruspex

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    Yes.
     
  6. Jan 6, 2013 #5
    xcsfa
     
    Last edited: Jan 6, 2013
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