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JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Work Done by Constant Force

  • question_answer
    A force of \[(3\,\hat{i}+4\,\hat{j})\] Newton acts on a body and displaces it by \[(3\,\hat{i}+4\hat{j})\,m.\] The work done by the force is       [AIIMS 2001]

    A)             10 J    

    B)             12 J

    C)             16 J    

    D)             25 J

    Correct Answer: D

    Solution :

                 \[W=\overrightarrow{F}.\overrightarrow{s}\]\[=(3\hat{i}+4\hat{j}).(3\hat{i}+4\hat{j})=9+16=25\,J\]


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