JEE Main & Advanced Physics NLM, Friction, Circular Motion Question Bank Second Law of Motion

  • question_answer
    A block of mass \[5\,kg\] is moving horizontally at a speed of 1.5 m/s. A perpendicular force of 5N acts on it for 4 sec. What will be the distance of the block from the point where the force started acting                                 [Pb. PMT 2002]

    A)             10 m   

    B)             8 m

    C)             6 m     

    D)             2 m

    Correct Answer: A

    Solution :

                    \[{{S}_{\text{Horizontal}}}=ut=1.5\times 4=6\,m\] \[{{S}_{\text{Vertical}}}=\frac{1}{2}a{{t}^{2}}=\frac{1}{2}\frac{F}{m}{{t}^{2}}=\frac{1}{2}\times 1\times 16=8\,m\]             \[{{S}_{\text{Net}}}=\sqrt{{{6}^{2}}+{{8}^{2}}}=10\,m\]


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