The questions move from topic to topic and are not passage based but it works as a great review, it can show you really quickly what equations and items to re-review and what you already have a firm grasp on. The usual free-standing physics questions are optics, gravity, and sound based (I took the MCAT 4 times.) Although it is correct that you don't get the practice with pulling info from passages the quick equation mastery is one skill that you can hone from these.