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I Veocity time graph for a tennis ball during a rally?

  1. May 5, 2017 #1
    Hi all,
    I am trying to draw a velocity time graph for a tennis ball during a rally. I am aware that the horizontal component of the velocity/speed will be constant, assuming negligable air resistance, and that the vertical component of the velocity will be a sawtooth shape. However I am unsure how to put these two components together to get an actual velocity time graph.
    Many thanks
  2. jcsd
  3. May 5, 2017 #2
    The magnitude of the velocity can be written as ##v=\sqrt {(v_h)^2+(v_v)^2}## where;
    ##(v_h)##:horizontal component of velocity in magnitude and
    ##(v_v)##:vertical component of velocity in magnitude.

    As you said horizontal component will be constant so this is actually one variable function.So using this function and values you can create velocity-time graph
  4. May 5, 2017 #3
    Velocity is a vector so plotting velocity versus time is usually done by plotting the components. You can also plot the magnitude and the angle of the vector versus time.
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