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  3. CEE Kerala Engineering

CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2000

  • question_answer
    The work done by the force\[4\hat{i}-3\hat{j}+2\hat{k}\]in moving a particle along a straight line from the point \[(3,2,-1)\] to\[(2,-1,4)\]is:

    A)  0 unit                                   

    B)  4 unit

    C)  15 unit                

    D)         19 unit

    E)  23 unit

    Correct Answer: C

    Solution :

    Work done = (Force . displacement) \[=(4\hat{i}-3\hat{j}+2\hat{k}).(-\hat{i}-3\hat{j}+5\hat{k})\] \[=(-4+9+10)=15\text{ }unit\]


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