As we are using vector math to solve for the unknown forces in the free body diagrams, what is k.i?

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As we are using vector math to solve for the unknown forces in the fre

1.	As we are using vector math to solve for the unknown forces in the free body diagrams, what is k.i?
A.	0
B.	1
C.	-1
D.	‚Äö√Ñ√∂‚àö‚Ä†‚àö¬™
Answer» B. 1