Posted by **M** on Thursday, March 29, 2012 at 7:38pm.

In Fig. 13-25, three particles are fixed in place. The mass of B is greater than the mass of C. Can a fourth particle (particle D) be placed somewhere so that the net gravitational force on particle A from particles B, C, and D is zero? If so, in which quadrant should it be placed and which axis should it be near?

fig: ht t p :// i. imgur.c om/283 Z6.jpg

(remove spaces)

Answers:

A) There is no place to put D to make this possible.

B) Yes; put D in the quadrant with x > 0 and y > 0, closer to the x axis.

C) Yes; put D in the quadrant with x > 0 and y > 0, closer to the y axis.

D) Yes; put D in the quadrant with x > 0 and y < 0, closer to the x axis.

E) Yes; put D in the quadrant with x > 0 and y < 0, closer to the y axis.

F) Yes; put D in the quadrant with x < 0 and y < 0, closer to the x axis.

G) Yes; put D in the quadrant with x < 0 and y < 0, closer to the y axis.

H) Yes; put D in the quadrant with x < 0 and y > 0, closer to the x axis.

I) Yes; put D in the quadrant with x < 0 and y > 0, closer to the y axis.

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