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Finding direction!

  1. Sep 20, 2009 #1
    1. The problem statement, all variables and given/known data
    A model sailboat is slowly sailing west across a pond at .33 m/s a gust of wind blowing at 28 degrees south of west gives the sailboat a constant acceleration of magnitude .30 m/s^2 during a time interval of 2.0 s (a) if the net force on the sailboat during the 2.0 s interval has magnitude .375 N, what is the sailboat's mass? (b) what is the new velocity of the boat after the 2.0-s gust of wind? (c) what is the new direction of the boat after the 2s gust of wind... ___ south of west.



    2. Relevant equations

    f=ma
    vf=vo+at
    tan^-1=vy/vx

    3. The attempt at a solution
    i have already determined a using f=ma .375 / .3 which is 1.25 kg

    i have part b... by using vf= vo + at which is .930 m/s

    but im very confused with c! i think that i should be using tan^-1 (Vy/Vx) but i have no idea what to plug in. help please :(
     
  2. jcsd
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