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Homework Help: Jet fighter flying in a vertical loop

  1. Aug 2, 2017 #1
    1. The problem statement, all variables and given/known data
    A jet fighter flies in a vertical circle of diameter 1000 m. The speed of the aeroplane at the bottom of this circle is 185 m s-1. For the aeroplane at this point, calculate:
    Apparent weight
    2. Relevant equations

    Fc = mv^2/r
    Ac = v^2/r
    Fn = Fg + Fc

    3. The attempt at a solution

    I cannot find a single way to find the apparent weight of something without mass, it is doing my head in. I have scowered the internet and nothing. Please help me!
  2. jcsd
  3. Aug 2, 2017 #2


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    What if you were to let M be the mass of the aircraft? What would you get? Can you work out the acceleration components?
  4. Aug 2, 2017 #3


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    I agree with you. Unless you are given the mass, you can not calculate the "apparent weight". However, you can calculate the number of g's and you can calculate a multiplying factor, A, of whatever the weight is: apparentWeight= A*airplaneMass.
  5. Aug 2, 2017 #4


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    @jstretto : This problem does have a solution . You would find it much easier to understand the problem and get to the solution if you drew a simple diagram .
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