1. Not finding help here? Sign up for a free 30min 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!

Vectors again

  1. Sep 6, 2004 #1
    a skier is accelerating down a 30.0 degrees hill at 3.10 m/s^2. What is the vertical component of her acceleration?

    I did 3.10 m/s^2 *sin(30) and got -1.55 m/s^2, but as usual, my answer is wrong.... :cry: The box for the answer looks like this: ____m/s2 (downward)... am I wrong because I put in the negative sign?
    Last edited: Sep 6, 2004
  2. jcsd
  3. Sep 6, 2004 #2
    >> ... am I wrong because I put in the negative sign?

  4. Sep 6, 2004 #3
    To expound a little. Yes because the question defined (+) to be downward when it said "accelerating down a 30.0 degrees hill at 3.10 m/s^2". By making your answer (-) you are sying the skier is accelerating in the direction opposite to the defined positive direction--the skier is accelerating upward.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Vectors again
  1. Series againand again (Replies: 4)

  2. HELP (again) (Replies: 5)

  3. Acceleration again (Replies: 9)

  4. Uncertainty Again (Replies: 0)