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註解 2019-09-23 123703.png

I know how to calculate the Force

but I dont know how to calculate the moment can anyone help me??

註解 2019-09-23 123703.png

Q2. (score 30)
2 m
F1 = (-3001 + 150j + 200k) N
1.5 m
B
O
F2 = [-450k) N
Replace the loading system by an equivalent
resultant force and couple moment acting at
point O.
(Final answer shall be in Cartesian vector
notation)

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1.jpg

Fe = EF
3 [ - 3 0 0 2 + 1 5 0 j + 20 0 * J + [- 450 k]
. [ - 30 0 2 + 150J - 250 K JN
position vector at A = j the (m)
posite. vecter or B , - 1.52 + 23 tik Cra )
moment of the two forces about...

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