2. Walker Problem 13, pg. 641
Given that q = +12 C and d = 16 cm, (a) find the direction
and magnitude of the net electrostatic force exerted on
the point charge q2 in Figure 19-30. (b) How would your
answers to part (a) change if the distance d were
tripled?
30-12-2013
2
3. Solution
Draw free body for JUST q2
F 21
k
(12 C )
( 0 . 16 m )
in direction
101 N x
ˆ
30-12-2013
24 C
F 23
2
from 1 to 2
Walker, Chapter 19
k
( 24 C )
36 C
( 0 . 16 m )
in direction
303 N x
ˆ
2
from 3 to 2
3
