KVPY Sample Paper KVPY Stream-SX Model Paper-29

  • question_answer
    A uniform triangular wedge of mass M is kept on smooth horizontal surface. A horizontal force F is applied on the wedge, then net force on the upper portion ABC is (AB = l/2 and neglect any effect of rotation)

    A) F/4

    B) F/3                 

    C) F

    D) 2F

    Correct Answer: A

    Solution :

    \[M\propto \frac{1}{2}{{l}^{2}}\]
    Mass of ABC   \[m\propto \frac{1}{2}\frac{{{l}^{2}}}{4}\]              ;\[m=\frac{M}{4},\]   \[F=Ma\]
    \[\therefore \] Ans. [A].

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