1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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: What is the speed of the wind?

  1. Sep 30, 2005 #1
    An aircraft heads due south with a speed relative to the air of 44m/s Its resultant speed over the ground is 47 m/s The wind blows from the west. A) What is the speed of the wind? B) What is the direction of the aircrafts path over the ground?

    I figured out a, 16.5 but i don't even know where to start when it comes to b except i know i need to use law of sines or law of cosines...HELP please
  2. jcsd
  3. Sep 30, 2005 #2
    PLEASE help me ive been working on this problem for hours
  4. Sep 30, 2005 #3


    User Avatar
    Homework Helper

    The velocities as vectors: vy = -44j. vx = ai
    v = vy + vx
    |v| = 47

    Draw a diagram, and you should be able to easily solve the angle, as vx and vy are perpendicular.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook