Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Lift required to sustain a refueling jet

  1. Sep 19, 2012 #1
    1. The problem statement, all variables and given/known data
    A jet is refueled in mid-air by a tanker. The fueling boom enters the aircraft at an angle of 30 degrees from its flight path. The fuel flow rate is 20kg/s at a velocity of 30m/s with respect to the two aircrafts. The density of the fuel is 700kg/m^3
    What is the additional lift needed to overcome the additional force?

    2. Relevant equations
    F= ma

    3. The attempt at a solution
    As Force is kg m/s^2, wouldn't the force be mass flow x velocity?
    Then just do sin 30 to the force to get the y component.
    But somehow I think I've got the wrong method...
  2. jcsd
  3. Sep 19, 2012 #2
    Think about this in terms of momentum and impulse.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook