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NEET Physics NLM, Friction, Circular Motion NEET PYQ-NLM Friction Circular Motion

  • question_answer
    A body, under the action of a force \[\overrightarrow{E}=\hat{i}2xy+\hat{j}({{x}^{2}}+{{y}^{2}})+\hat{k}(3xz-{{y}^{2}})\] acquires an acceleration of \[\overrightarrow{E}=\hat{i}{{z}^{3}}+\hat{j}xyz+\hat{k}{{z}^{2}}\]. The mass of this body must be [AIPMT (S) 2009]

    A) \[\overrightarrow{E}=\hat{i}(2xy-{{z}^{3}})+\hat{j}x{{y}^{2}}+\hat{k}3{{z}^{2}}x\]

    B) 10kg     

    C) 20kg

    D) \[2\times {{10}^{4}}J{{T}^{-1}}\]

    Correct Answer: D

    Solution :

    Key Idea: According to Newton’s second law of motion, force = mass \[\times \] acceleration.
                Here,     \[=k(x+a)\]
                            \[k,{{k}_{0}},{{k}_{1}}\]
                            \[9\times {{10}^{17}}\]
                            \[3\times {{10}^{16}}\]
                \[9\times {{10}^{15}}\] \[3\times {{10}^{19}}\]


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