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What equation do you use for this?

  1. Sep 19, 2005 #1
    a 4500kg helicopter accelerates upward at 2m/s^2 what lift force is exerted by the air on the propellers?
     
  2. jcsd
  3. Sep 19, 2005 #2

    Doc Al

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    Staff: Mentor

    Use Newton's 2nd Law. (Don't forget to include all the forces acting on the helicopter.)
     
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