Problem 4.109 Part A Replace the loading by an equivalent resultant force and co

Question

Problem 4.109 Part A Replace the loading by an equivalent resultant force and couple moment at point O. Suppose that F1 8i- 2k) kN and F, = {-41+ -2k) kN. (Figure 1) Determine the resultant force Enter the z, y, and z components of the force separated by commas using three significant figures. kN Submit My Answers Give Up Part B Determine the equivalent resultant couple moment about point C Enter the z, y, and z components of the moment separated by commas using three significant figures. Figure 1of 1 kN m Submit My Answers Give Up 0.5 m 0.7 m 0.8 m

Explanation / Answer

(A) F = F1 + F2

= (8 - 4)i + (0 + 5)j + (-2-2)k

F = 4i + 5j - 4l kN

Ans: 4 , 5 , -4

(B) r1 = (0.8i - 1.2k)

r2 = - 0.5k

M = (r1 x F1) + (r2 x F2)

= ( 1.6j - 9.6j) + (2j + 2.5i )

= 2.5i - 6j k N -m

Ans: 2.5, -6, 0

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