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A rectangular parallelepiped carries three forces shown in fig. Reduce the force system to a resultant force applied at the origin and a moment around origin.

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NOTE: We have to replace by a force and a couple. It means we need to find the Resultant and the total moment about origin.

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R=484i+350j103kNM=M1+M2+M3

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= [i(412)j(515)+k(686)]+[i(0)j(0)+k(500)]+[i(750)j(937.5)+k(0)]M=338i1452.5j+186kNm

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