To be prepped for a quizzam, there is a review set for gravity in the Gravity folder on our 3 Chem/Phys website. Give the multiple choice and two free response problems a try, and there is a solutions file to check yourselves right away. Note that the second free response problem has to do with an elliptical orbit. The big thing there is that energy is conserved, and the total energy in an elliptical orbit is
E = -GMm/2a, where a is the semimajor axis...for the picture that is given, 2a = r1 + r2. Then use energy conservation for the first couple parts. Don't worry about the questions about angular momentum (parts d,e,f), we have not done that yet.
Additional practice problems dealing with the very basic definitions for rotational motion from Tuesday, that being with constant angular acceleration, are Chapter 9 #1, 2, 7, 13, 14, which are in the rotations packet.
Keep in mind there are videos on all the gravity topics as well as one introducing the main rotational quantities. The links to videos are on the blog. There are numerous examples in the book.
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