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OpenStudy (anonymous):
Part of the roof of a sports stadium is to be supported by the cables AB and AC. the forces the cables exert on the pylon to which they are attached are represented by the vectors Fab and Fac. The magnitudes of the forces are I Fab I =100kN and I Fac I= 60 KN . Determine the magnitude and direction of the sum of the forces exerted on the pylon by the cables.
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