So you learned about Castigliano's Theorem, and now you need to use it to find a deflection? No worries - this video goes through my three basic rules for using Castigliano's Theorem effectively. This list comes from having taught Castigliano's Theorem and seeing students get hung up on these points. A lot.
If you're after a video with the theory behind it, this is NOT that video! I plan to make one of those, but haven't yet.
