JEE Main & Advanced Physics Vectors Question Bank Fundamentals of Vectors

  • question_answer A hall has the dimensions \[10\,m\times 12\,m\times 14\,m.\]A fly starting at one corner ends up at a diametrically opposite corner. What is the magnitude of its displacement

    A)             17 m                                         

    B)             26 m                                         

    C)             36 m                                         

    D)             20 m

    Correct Answer: D

    Solution :

                    Diagonal of the hall = \[\sqrt{{{l}^{2}}+{{b}^{2}}+{{h}^{2}}}\]                    \[=\sqrt{{{10}^{2}}+{{12}^{2}}+{{14}^{2}}}\]                    \[=\sqrt{100+144+196}\]             \[=\sqrt{400}=20m\]


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