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Basic kinematics of duck paddle

  1. Jun 7, 2007 #1
    1. The problem statement, all variables and given/known data

    In a total time of 2.0 min, a duck on a pond paddles 22m [36deg N of E] and then paddles another 65 m [E 25deg S].

    Determine the duck's

    i) total distance....I answered this.
    ii) average speed...I answered this.
    iii) total displacement...This is my dilema.
    iv) average velocity....I can aswer this one once I know the displacement.

    2. Relevant equations

    I'm really not sure how to go about finding the displacement when angles are involved. Do I use trig or one of the formula's?

    3. The attempt at a solution

    Using trig on the vector diagram I came up with a displacement of 34m [E 25deg S].
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Jun 7, 2007 #2
    split the two displacements into componenets (N,W,S,E)
    then sum them up (but dont forget to subtract when necessary)
    I mean use vector sum :)
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