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Homework Help: Velocity vector of cue ball

  1. Apr 28, 2016 #1
    1. The problem statement, all variables and given/known data
    I need to find the velocity vector of the cue ball. I know the start-coordinates, end-coordinates(when it hits the red ball), and the time it takes for the travel, but i have no clue on how to make the vector.
    start(21, 0)
    end(21, 12)
    time = 0.1seconds
    not sure if nessecary, but both of the balls diameters are 5.715cm

    I need the velocity vector to calculate the end-coordinates of the red ball.

    help is much appreciated :)
  2. jcsd
  3. Apr 28, 2016 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    You only need the com velocity.
    Start with the definition: displacement over time.
    Can you draw the displacement vector?
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