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

  • question_answer
    A stone is projected from the ground with velocity \[25\,m/s\]. Two seconds later, it just clears a wall 5 m high. The angle of projection of the stone is \[(g=10m/{{\sec }^{2}})\]

    A) \[{{30}^{o}}\]

    B) \[{{45}^{o}}\]

    C) \[{{50.2}^{o}}\]

    D) \[{{60}^{o}}\]

    Correct Answer: A

    Solution :

    [a] For vertical upward motion \[h=ut-\frac{1}{2}g{{t}^{2}}\] \[5=(25\sin \theta )\times 2-\frac{1}{2}\times 10\times {{(2)}^{2}}\] \[\Rightarrow 25=50\,\sin \theta \Rightarrow \sin \theta =\frac{1}{2}\Rightarrow \theta =30{}^\circ \]

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