1.

The linear velocity of a rotating body is given by \[\overrightarrow{v}=\overrightarrow{\omega }\times \overrightarrow{r},\]where \[\overrightarrow{\omega }\] is the angular velocity and \[\overrightarrow{r}\] is the radius vector. The angular velocity of a body is \[\overrightarrow{\omega }=\hat{i}-2\hat{j}+2\hat{k}\] and the radius vector \[\overrightarrow{r}=4\hat{j}-3\hat{k},\] then \[|\overrightarrow{v}|\] is

A.                 \[\sqrt{29}\]units            
B.                 \[\sqrt{31}\]units
C.                 \[\sqrt{37}\]units            
D.                 \[\sqrt{41}\]units
Answer» B.                 \[\sqrt{31}\]units


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