Final answer:
Real-life objects that serve as examples of solids of revolution include symmetrical ice sculptures, bowling balls, and the Earth. Systems in motion such as a speeding merry-go-round and the formation of tornadoes demonstrate principles of rotational dynamics and the conservation of angular momentum.
Step-by-step explanation:
Real-life objects that are examples of solids of revolution include everyday items shaped by rotating a profile around an axis. For instance, an ice sculpture that is symmetrical can be considered a solid of revolution. Another example is a bowling ball, which is essentially spherical and created by rotating a circular profile around an axis. Even the Earth itself, despite being an oblate spheroid rather than a perfect sphere, is an example of a solid of revolution due to the rotation of a massive cloud of gas and dust during its formation.
When considering systems in motion, the conservation of angular momentum and changes in rotational inertia can be seen in various contexts. For example, a merry-go-round that speeds up from rest to a constant rotational speed showcases the principles of rotational dynamics. Similarly, a tornado acquiring high speeds from a slowly rotating storm system illustrates how a reduction in the radius of rotation can lead to an increase in angular velocity due to the conservation of angular momentum.