A force \[\mathbf{F}=2\mathbf{i}+\mathbf{j}-\mathbf{k}\] acts at a point A, whose position vector is \[2\mathbf{i}-\mathbf{j}\]. The moment of F about the origin is [Karnataka CET 2000]

\[\mathbf{i}-2\mathbf{j}+4\mathbf{k}\]

\[\mathbf{i}+2\mathbf{j}-4\mathbf{k}\]

\[\mathbf{i}-2\mathbf{j}-4\mathbf{k}\]

\[\mathbf{i}+2\mathbf{j}+4\mathbf{k}\]

A force \[\mathbf{F}=2\mathbf{i}+\mathbf{j}-\mathbf{k}\] acts at a poi

1.	A force \[\mathbf{F}=2\mathbf{i}+\mathbf{j}-\mathbf{k}\] acts at a point A, whose position vector is \[2\mathbf{i}-\mathbf{j}\]. The moment of F about the origin is [Karnataka CET 2000]
A.	\[\mathbf{i}+2\mathbf{j}-4\mathbf{k}\]
B.	\[\mathbf{i}-2\mathbf{j}-4\mathbf{k}\]
C.	\[\mathbf{i}+2\mathbf{j}+4\mathbf{k}\]
D.	\[\mathbf{i}-2\mathbf{j}+4\mathbf{k}\]
Answer» D. \[\mathbf{i}-2\mathbf{j}+4\mathbf{k}\]

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A force \[\mathbf{F}=2\mathbf{i}+\mathbf{j}-\mathbf{k}\] acts at a point A, whose position vector is \[2\mathbf{i}-\mathbf{j}\]. The moment of F about the origin is [Karnataka CET 2000]

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