Chapter 13, Problem 9Q

Figure 13-28 shows three particles initially fixed in place, with B and C identical and positioned symmetrically about the y axis, at distance d from A. (a) In w hat direction is the net gravitational force ${\stackrel{\to }{F}}_{net}$ on A? (b) If we move C directly away from the origin, does ${\stackrel{\to }{F}}_{net}$ change in direction? If so, how and what is the limit of the change?

Figure 13-28 Question 9.