TPR Physics: Section 1 Passage II

[MT2MD]

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So I started TBR Physics and the passage. It is just me or the passage asked material that are not in the book. How am I suppose to know hot air is less dense and top spin creates more lift from reading the first chapter

 

[Akarat]

I think it's a strategy for TBR. I normally tend to remember a problem longer if I missed it, than if I answered it correctly. Additionally, there's always the chance that after reading content for a few minutes, there's a tendency to become less focused on it. Therefore, I'm assuming that TBR decided to put some of the content in the passages, so that you will have to pay attention - cause, after all, you're taking a test.