I'm sure you can if you really want to.
A broken wrist is a damn painful injury. I don't know why you would want to try.
No, you'll have to use the W edition of the encyclopedia. That should do the trick.
Whatever issue that you're running into that you believe breaking your wrist will fix, I would advise you to re-think why you want to dodge the situation. You will come across difficult situations your entire life. The trick is to get through them - learn something - and move on.
I would also ask this question - why are you so willing to break your wrist that will takes weeks to heal - instead of working through the initial problem?
Oh no here we go again! PLEASE SEEK PROFESSIONAL HELP! This is clearly a mental health issue! PLEASE!