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3. 3D RIGID BODY Determine the support reactions at O (ball-and-socket) and the tensions in cables AB and AC. (Helpful Hints:
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Coordinates I Points N as 0 o o А 0 8 o B 3 2 C 0 -7 - 4 * Unit vectors A AB (3-9 î +(-5-0)ị +(2-8) Ř √3+(-572+6632 3 i +(-5)> 20J - 2 AĈ= €7-0 i + (- 4-0) ] + (0-8) & /67)²+(-4)²+(-8)? A²z -7 - 47 -8 Å / 129 Forres vectos F R = Rx E+ Ry ft Rz TAB =we get .32 TAC 160 40 TAB J129 J70 56 TAC - 24 -TAB 0 J129 J70 on solving TAC 14.499 u Bab 1 4.5 KN = TAC = 14.5kN and TAB =

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