This may seem like an odd question (and Im not even sure this is the right forum for this post), but approximately how much is a video game physics programmer's annual salary?

As physics engines are increasingly licensed rather than built in-house, the demand -- and therefore the pay scale -- decreases.

Highly valued physics programmers are often people with CS degrees, plus an advanced degree in math and/or physics. Double masters degrees in math+cs or physics+cs are fairly common.

Normal, everyday gameplay programmers may be expected to learn how to use one of the many commercial physics engines as a matter of course.

Unless you happen to have a double degree, expect to earn about the same as your co-workers. With the double degree, don't expect much more than the single-degree counterparts.