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... when two things impact the speed of separation must ALWAYS be less than the speed of approach due to conservation of energy.
Quote from: survivalist13 on 15/06/2012 11:55:16... when two things impact the speed of separation must ALWAYS be less than the speed of approach due to conservation of energy. The energy of the ball also includes the kinetic energy of the ball spinning rapidly, (which is not obvious).If a spinning ball caught the edge of the hole it could jump out faster than it went in, as some of the spinning energy has now been converted into translational motion.
If you have an equation for rotational energy you should be able to work out the potential speed increase from a impact, might be interesting
here is a picture:http://english.chosun.com/site/data/img_dir/2011/03/29/2011032900540_0.jpgThe ball travels along the white line shown , then catches the right edge of the hole, and will then be deflected left (at say 15 degrees). Does the deflections speed the ball up or slow it down?