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Need Help on Acceleration Problem!

  1. Sep 4, 2007 #1
    1. The problem statement, all variables and given/known data

    A world's land speed record was set by Colonel John P. Stapp when in March 1954 he rode a rocket-propelled sled that moved along a track at 1020 km/h. He and the sled were brought to a stop in 1.4 s. In g units, what acceleration did he experience while stopping?

    2. Relevant equations
    I think im supposed to use the constant acceleration equation
    v = v(0) + at

    1 g unit = 9.8m/s^2

    3. The attempt at a solution
    You only get two attempts to get it right. My first attempt was 1239.06 g units but it was wrong. My second time around i got -1239.06 g units but i was just wondering if anyone could double check it. Thanks in advance.
  2. jcsd
  3. Sep 4, 2007 #2
    i'll try this Q...nah, cant get the ans, it is too hard sry cuz i oso g 1239.06g
  4. Sep 4, 2007 #3


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    Science Advisor
    Homework Helper

    Why are you responding to questions you can't answer? In txt? mpgriffis, convert km/hr to m/sec before you divide by g and time. Carefully. Humans surviving more than a few tens of g's for more than a fraction of a second is unheard of. I have no clue how either one of you got 1238.06g.
    Last edited: Sep 4, 2007
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