1. A Ferris wheel 22.0 m in diameter rotates once every 12.5 s (see Fig. 5 19). What is the ratio of

1. A Ferris wheel 22.0 m in diameter
rotates once every 12.5 s (see Fig. 5 19). What is the ratio of a person’s
apparent weight to her real weight (a) at the top, and (b) at the bottom?

FIGURE 5-19

2. Three bodies of identical mass M form
the vertices of an equilateral triangle of side  and rotate in circular orbits about the center of the triangle. They
are held in place by their mutual gravitation. What is the speed of each?