<p>Has anyone done this before and if so, what is the difficulty and the level of Physics required?</p>
<p><a href="http://www.aapt.org/Contests/olympiad.cfm%5B/url%5D">http://www.aapt.org/Contests/olympiad.cfm</a></p>
<p>It's probably really hard. One of my friends knew one of the four who competed in the international Chemistry Olympiad representing the US and he was like a mega genius, so the Physics one should be competitive as well.</p>
<p>The preliminaries are easy, the semifinals are ridiculous. The first round got a bit harder last year, though. Level of physics -- get as much as you can.</p>