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Average force on a airplane

  1. Sep 22, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1150kg airplane starts from rest and accelerates forward for 7.3 seconds until it reaches its takeoff speed of 31m/s. What is the average force on the airplane during this time?

    I tried F= ma, but I get a number that is far too large.
    F= 1150kg times (31/7.3) = 4883.6N

    I tried on a similar problem with a similar weight and got an answer in the hundreds when the answer was simply 6N.

    Help please.
    Last edited: Sep 22, 2009
  2. jcsd
  3. Sep 23, 2009 #2


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    Homework Helper

    Your answer is correct.
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