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J & K CET Engineering J and K - CET Engineering Solved Paper-2003

  • question_answer
    If forces of \[12,\text{ }5\] and \[13\] unit weight balance at a point, two of them are inclined at

    A)  \[{{30}^{o}}\]           

    B)  \[{{45}^{o}}\]

    C)  \[{{60}^{o}}\]           

    D)  \[{{90}^{o}}\]

    Correct Answer: D

    Solution :

    Since \[{{(13)}^{2}}={{(12)}^{2}}+{{(5)}^{2}},\] therefore forces are perpendicular.


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