Friday, October 10, 2014

You are on a hike in the woods with your CD player when a rather large bug of mass 5.0 g manages to...

1. Moment of Inertia of a Dirty CD

You are on a hike in the woods with your CD player when a rather large bug of mass 5.0 g manages to land on the edge of your favorite CD (mass 9.0 g and radius 6.0 cm). How does that affect the CD’s moment of inertia? (Ignore the hole in the center of the CD.)

2. Motion of a Frisbee

You and a friend are playing catch with a Frisbee (Fig. 8.29). Estimate the total angular displacement of the Frisbee as it travels from you to your friend. Assume the Frisbee’s angular velocity is constant.

Figure 8.29 Example 8.8. A Frisbee spins about its axis with an angular velocity that is approximately constant during the course of a “throw.” This rotational motion is independent of the Frisbee’s translational motion.

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