MCQOPTIONS
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MCQOPTIONS
| 1. |
The vector that must be added to the vector \[\widehat{i}-3\widehat{j}+2\widehat{k}\] and \[3\widehat{i}-6\widehat{j}+7\widehat{k}\] so that the resultant vector is a unit vector along the y-axis, is |
| A. | \[4\widehat{i}-2\widehat{j}+5\widehat{k~}~~\] |
| B. | \[-\,4\widehat{i}-2\widehat{j}+5\widehat{k~}~~\] |
| C. | \[3\widehat{i}-4\widehat{j}+5\widehat{k~}~~\] |
| D. | Null vector |
| Answer» C. \[3\widehat{i}-4\widehat{j}+5\widehat{k~}~~\] | |