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Physics Launcher

  1. May 24, 2010 #1
    I build a tennis ball launcher that travels 15 meters. I need help calculating the following:
    - friction of the wire with the pulley (and/or any other sources of friction)
    - tension in the wire (including the spring?)
    The wire is hooked on one end of the catapult, and it extends around the pulley and is attached to a spring, which is attached to a wooden plank (which is attached to the base).
    - vertical height of the ball (ball travels in assumed perfect parabolic motion)

    Here is a (rather crude) picture of my launcher: http://img62.imageshack.us/img62/7086/66428016.jpg [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
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