30
o
R
A
B
C
A = -4.65 i
B = -(12.7 sin 30
o
)i + (12.7 cos 30
o
)j = -6.35 i + 11.0 j
C = 11.0 i
R = A+B+C= -4.65 i + (- 6.35
i + 11.0 j) + 11.0 i
= -11.0 i +11.0i + 11.0j =
11.0 j
(11.0 km due north)
take
i (east)
j(north)
-i (west)
-j (south)