th-forces-F-1-F-2-F-3-act-at-points-ith-position-vectors-r-1-r-2-r-3-where-F-1-4i-j-2k-N-r-1-6i-4j-k-m-F-2-i-2j-k-N-r-2-i-5j-2k-m-F-3-5i-

Question Number 95726 by Rio Michael last updated on 27/May/20

th forces F_{1}, F_{2}, F_{3} act at points ith position vectors r_{1}, r_{2}, r_{3} where

F_{1} = (4 i + j + 2 k) N r_{1} = (6 i + 4 j + k) m

F_{2} = (i - 2 j + k) N r_{2} = (i + 5 j - 2 k) m

F_{3} = (- 5 i + j - 3 k) N r_{3} = (i + j + k) m

(a) show that this system reduces to a couple and find its magnitude .

(b) if F_{3} is removed and replaced with F_{4} such that the system is

now in equilibrium find the force vector F_{4} .

(c) the equation of the line of action of F_{4}

(d) the moment of F_{4} about the origin .

Commented by Rio Michael last updated on 29/May/20

please anyone help me with this Q 95726