If there's one place I did NOT get the physics "sense", that was in a college classroom (and I aced all my college physics classes). All I did was memorise formulas and plug and chug.
Wierdly enough, I began to develop a physics "sense" in a Kaplan class. For example, anyone who took College Physics knows the basic principle of Bernoulli's Law - Pressure and Velocity are inversely proportional to each other in fluids. But can they make the jump from knowing that principle to applying it to real life scenarios? Like during a storm, why do windows in a room blow OUT of the room into the storm instead of into the room?
Knowing the principle is college physics. Applying it is MCAT Physics. I currently teach the MCAT for Kaplan and I stress to my students everyday that the best way to beat the test is to practice their asses off. Being that it is a standardised test, your best best would be master the format by enough practice so that test day seems like just another practice session.
Basically OP, I would advise taking Physics I, II in the summer while taking a prep course for the august test at the same time and leave Biochem for after. This way, you can get the concepts in class, learn to APPLY them in the prep class and practice them simultaneously. That's the best way to ace the Physics part of the MCAT.
Atleast, this is what I advise my students to do.
Good Luck,
KnightInBlue
P.S. In a storm, there are high speed winds outside. When air (a fluid) flows by at such a high speed outside the window, pressure is lowered outside the window (Bernoulli's principle). Since air inside the room is at a higher pressure than outside, the windows are blown OUT into the storm.