Question: Problem 1 : F 1 = { 5 , - 6 , - 1 } , F 2 = { 1 , - 2 ,

Problem 1:
F1={5,-6,-1},F2={1,-2,-5},F3={-2,6,4} are given in kN .
Determine the magnitude of the resultant force FR of the given forces;
Calculate the directional cosines of FR;
Find the unit vector eFr2 of FR;
Determine the angle between FR and z axils.
Problem 1 : F 1 = { 5 , - 6 , - 1 } , F 2 = { 1 ,

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