Three forces \[\mathbf{i}+2\,\mathbf{j}-3\,\mathbf{k},\,\,2\,\mathbf{i}+3\,\mathbf{j}+4\,\mathbf{k}\] and \[\mathbf{i}-\mathbf{j}+\mathbf{k}\] are acting on a particle at the point (0, 1, 2). The magnitude of the moment of the forces about the point \[(1,\,-2,\,0)\] is [MNR 1983]

Three forces \[\mathbf{i}+2\,\mathbf{j}-3\,\mathbf{k},\,\,2\,\mathbf{i

1.	Three forces \[\mathbf{i}+2\,\mathbf{j}-3\,\mathbf{k},\,\,2\,\mathbf{i}+3\,\mathbf{j}+4\,\mathbf{k}\] and \[\mathbf{i}-\mathbf{j}+\mathbf{k}\] are acting on a particle at the point (0, 1, 2). The magnitude of the moment of the forces about the point \[(1,\,-2,\,0)\] is [MNR 1983]
A.	\[2\sqrt{35}\]
B.	\[6\sqrt{10}\]
C.	\[4\sqrt{17}\]
D.	None of these
Answer» C. \[4\sqrt{17}\]

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Three forces \[\mathbf{i}+2\,\mathbf{j}-3\,\mathbf{k},\,\,2\,\mathbf{i}+3\,\mathbf{j}+4\,\mathbf{k}\] and \[\mathbf{i}-\mathbf{j}+\mathbf{k}\] are acting on a particle at the point (0, 1, 2). The magnitude of the moment of the forces about the point \[(1,\,-2,\,0)\] is [MNR 1983]

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