1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Determine the direction of vector

  1. Sep 20, 2012 #1
    Find the direction of the vector . Let the direction of a vector be the angle that the vector makes with the +x-axis, measured counterclockwise from that axis. x=7.25 km, y=-3.50 km

    Please help. I got -25.769, but when I entered it (to the correct sig figs) mastering physics said it was wrong.
  2. jcsd
  3. Sep 20, 2012 #2
    Have you tried entering 360 - 25.769 = 334.231?
  4. Sep 20, 2012 #3
    That worked, thank you so much. But why did it have to be subtracted from 360?
  5. Sep 20, 2012 #4
    Do they want the answer in degrees?
  6. Sep 20, 2012 #5
    Yes, but it I got the answer. It had to be subtracted from 360. Thank you anyway.
  7. Sep 20, 2012 #6
    If the y component is negative and the x component is positive, in what quadrant will it be?
    Draw a sketch if you don't see it.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook