1.

Five points given by A, B, C, D, E are in a plane. Three forces \(\vec {AC},\; \vec {AD}\) and \(\vec {AE}\) act at A and three forces \(\vec {CB},\;\vec {DB},\;\vec {EB}\) act at B. Then their resultant force is:

A. \(2 \vec {AC}\)
B. \(3 \vec {AB}\)
C. \(3 \vec {DB}\)
D. \(2 \vec {BC}\)
Answer» C. \(3 \vec {DB}\)


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