Is an AP Physics high school student ready for Graduate School?

The AP Physics tests test your knowledge on the first semester or two of introductory physics courses you would take as an undergraduate. You have dozens of classes in physics and mathematics as well as experience in research techniques to get under your belt before graduate school. One AP test doesn't cover 4 years of undergraduate instruction.

Edit: and I did read the objectives....they are basic concepts taught in introductory college physics courses that students taking the AP Physics B and/or C exams should know

I think you're confusing graduate school with a first year Physics class in college.

An AP student in ANY subject would utterly, utterly fail in a graduate-level course (which is why they would never be allowed to take them). An AP student is just going to have a leg up over the rest in taking a basic physics class in college or possibly (if s/he scores a 4 or a 5) the chance to skip the first level of physics and start on the next.

I think the AP Physics courses in high school are just introductory college courses. There are even more advanced physics classes and new topics in college that you need to take in order to be ready for graduate school.

Your question is somewhat twisted -- most answers appear to focus on "Is a high school student ready for graduate school after taking an AP physics class?" No.

You asked for if an AP Physics student knew everything in the objectives (they don't).

I don't think any answers came from people who have seen the objectives.

You think that a thorough knowledge of high school AP Physics would be enough to prepare you for grad school and essentially skip 4 years worth of college courses?

You must think pretty highly of yourself. There's a difference between being ambitious and being absurd.

no. ap classes are usually just the first semester (sometimes the first and second) classes of college.