Example Problem Solutions from:

Physics for Scientists & Engineers

by Douglas C. Giancoli
Volume 1, 4th Edition, Pearson Prentice Hall, Upper Saddle River, NJ, 2008

Chapter 11: Angular Momentum; General Rotation

"CHAPTER-OPENING QUESTIONS - Guess now!
You are standing on a platform at rest, but that is free to rotate. You hold a spinning bicycle wheel by its axles as shown here. You then flip the wheel over so its axle points down. What happens then?
(a) The platform stats rotating in the direction the bicycle wheel was originally rotating.
(b) The platform starts rotating in the direction opposite to the original rotation of the bicycle wheel.
(c) The platform stays at rest.
(d) The platform turns only while you are flipping the wheel.
(e) None of these is correct."

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