JEE Main & Advanced Physics Two Dimensional Motion Sample Paper Topic Test - Two Dimensional Motion

  • question_answer
    Referring to the above two questions, the acceleration due to gravity is given by         

    A) \[10\,m/{{\sec }^{2}}\]

    B) \[5m/{{\sec }^{2}}\]

    C) \[20\,\,m/{{\sec }^{2}}\]

    D) \[2.5\,\,m/{{\sec }^{2}}\]

    Correct Answer: A

    Solution :

    [a] \[{{a}_{x}}=\frac{d}{dt}({{v}_{x}})=0\], \[{{a}_{y}}=\frac{d}{dt}({{v}_{y}})=-10\ m/{{s}^{2}}\] \[\therefore \] Net acceleration a =\[\sqrt{a_{x}^{2}+a_{y}^{2}}\]=\[\sqrt{{{0}^{2}}+{{10}^{2}}}\]=10\[m{{s}^{2}}\]

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