Question sets and answer keys to accompany The Mechanical Universe High School Adaptation episodes described below. The high school adaptation videos are no longer available for purchase, and none of the previous distributors posted them for streaming. I posted them to YouTube and have included the corresponding video links below.
Set 8: Forces And Relativity
8.1. The Fundamental Forces [Two Versions] Link to video 8.1
8.2. The Michelson Morley Experiment  Link to video 8.2
8.3. Special Relativity Link to video 8.3
Two versions (where available) reduces the wandering-eye tendencies of neighbors; certain students might even complain that there is something wrong with their sheet since it's different from their neighbor's!
Other Lessons of Phyz advantages:
Document remastering in June, 2019: cosmetic updates so that these pages better match other Lessons of Phyz video question sets.
Product description updated in July, 2019 to reflect the availability of the videos on YouTube. Video links added. A page with all the Mechanical Universe High School Adaptation videos can be found here.