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Mar 22, 2016 at 19:45 history edited grfrazee CC BY-SA 3.0
added 23 characters in body
Feb 22, 2015 at 21:36 history edited HDE 226868 CC BY-SA 3.0
Edited LaTeX.
Feb 22, 2015 at 9:00 comment added Paŭlo Ebermann Hopefully the hit is not that hard that the bottle breaks.
Feb 22, 2015 at 3:03 comment added Loki Astari Not sure converting the swing into a force number is that meaningful. Swings higher pendulum does when harder hit it is (Yoda). If you are talking to kids (or even advanced students) that is all they need to know (don't think an advanced physics class is going to help a karatee student).
Feb 20, 2015 at 20:28 history edited Jeff CC BY-SA 3.0
Added formulas.
Feb 20, 2015 at 17:41 comment added Chris Mueller +1 for simplicity. I agree with HDE though, you should add the mathematics to make it a more complete answer.
Feb 20, 2015 at 15:11 review First posts
Feb 20, 2015 at 16:06
Feb 20, 2015 at 15:09 history answered Jeff CC BY-SA 3.0