JEE Main & Advanced Mathematics Vector Algebra Question Bank Modulus of vector Algebra of vectors

  • question_answer
    If the resultant of two forces is of magnitude P and equal to one of them and perpendicular to it, then the other force is                                                                                                 [MNR 1986]

    A) \[P\sqrt{2}\]

    B) P

    C) \[P\sqrt{3}\]          

    D) None of these

    Correct Answer: A

    Solution :

    \[|\overrightarrow{AB}|=\,|Q|\,=\sqrt{{{P}^{2}}+{{P}^{2}}}=P\sqrt{2}\].            


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