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ABCD is a quadrilateral. Force vec(AB), ...

ABCD is a quadrilateral. Force `vec(AB), vec(CB), vec(CD) and vec(DA)` act along its sides. What is their resultant ?

A

A. `2 vec(CD)`

B

B. `2 vec(DA)`

C

C. `2 vec(BC)`

D

D. `2 vec(CB)`

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The correct Answer is:
D
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