MCQOPTIONS
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MCQOPTIONS
| 1. |
The resultant of \[\vec{A}\] and \[\vec{B}\] is \[{{\vec{R}}_{1}}\]. On reversing the vector \[\vec{B},\] the resultant becomes \[{{\vec{R}}_{2}}\]. What is the value of \[R_{1}^{2}\,+\,R_{2}^{2}\,?\] |
| A. | \[{{A}^{2}}+\,{{B}^{2}}\] |
| B. | \[{{A}^{2}}-{{B}^{2}}\] |
| C. | \[2({{A}^{2}}+\,{{B}^{2}})\] |
| D. | \[2({{A}^{2}}-\,{{B}^{2}})\] |
| Answer» D. \[2({{A}^{2}}-\,{{B}^{2}})\] | |