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NEET Sample Paper NEET Sample Test Paper-24

  • question_answer
    A force \[(\vec{F})=3\hat{i}+c\hat{j}+2\hat{k}\]acting on a particle causes a displacement: \[(\vec{s})=-4\hat{i}+2\hat{j}+3\hat{k}\]in its own direction. If the work done is 6 J, then the value of 'c' is

    A)  0                                

    B)  1

    C)  6                                

    D)  12

    Correct Answer: C

    Solution :

     \[W=(3\hat{i}+c\hat{j}+2\hat{k}).(-4\hat{i}+2\hat{j}+3\hat{k})=6\]joule \[W=-12+2c+6=6\Rightarrow c=6\]


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