5 Concept 3 - Resultant of force vectors Using the force vectors obtained in Concept 1 Problem 2, calculate the magnitude of the resultant force the following problem. Note: If you did not work on Concept 1 problems, use Fb = (-2001 +400j-400k) lb and Fc = (-420i + 210j -140k) lb 2 ft A Fc-490 lb FB 600 lb 6 ft 4 ft 3 ft B 4 ft 2 4 ft Find the magnitude of the resultant force