Multiple Choice
When the vector sum of three co-planar forces, 
, 
And 
,is parallel to 
,we can conclude that 
And 
A) must sum to zero.
B) must be equal and opposite.
C) must have equal and opposite components perpendicular to
.
D) must have equal and opposite components parallel to
.
E) must have equal and opposite components parallel and perpendicular to
.
Correct Answer:

Verified
Correct Answer:
Verified
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