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NEET Sample Paper NEET Sample Test Paper-40

  • question_answer
    A force \[\vec{F}=(5\hat{i}+4\hat{j})N\]acts on a body and produces a displacement \[\vec{F}=(6\hat{i}-5\hat{j}+3\hat{k})m.\] The work done will be

    A)  10 J

    B)  20 J

    C)  30 J

    D)  40 J

    Correct Answer: A

    Solution :

     \[W=\vec{F}-\vec{s}=(5\hat{i}+4\hat{j}).(6\hat{i}-5\hat{j}+3\hat{k})\] \[=30-20=10\,J\]


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