BCECE Engineering BCECE Engineering Solved Paper-2006

  • question_answer
    The (x, y, z) coordinates of two points A and B are given respectively as (0, 3,-1) and (-2, 6, 4). The displacement vector form A to B may be given by:

    A) \[-2\mathbf{\hat{i}}+6\mathbf{\hat{j}}+4\mathbf{\hat{k}}\]                    

    B)         \[-2\mathbf{\hat{i}}+3\mathbf{\hat{j}}+3\mathbf{\hat{k}}\]

    C)        \[-2\mathbf{\hat{i}}+3\mathbf{\hat{j}}+5\mathbf{\hat{k}}\]                    

    D)         \[2\mathbf{\hat{i}}-3\mathbf{\hat{j}}-5\mathbf{\hat{k}}\]

    Correct Answer: C

    Solution :

    The displacement, vector from \[A\equiv (0,\,3,\,-1)\] to \[B\equiv \,(-2,\,6,\,4)\] is \[=(-2\hat{i}+6\hat{j}+4\hat{k})-(3\hat{j}-\hat{k})\] \[=-2\hat{i}+3\hat{j}+5\hat{k}\]


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