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KVPY Sample Paper KVPY Stream-SX Model Paper-17

  • question_answer
    A mass of 10 kg is suspended vertically by a rope from the roof. When a horizontal force is applied on the rope at some point, the rope deviated at an angle of \[45{}^\circ \] at the roof point. If the suspended mass is at equilibrium, the magnitude of the force applied is \[(g=10\text{m}{{\text{s}}^{-2}})\]

    A) 200 N

    B) 140 N

    C) 70 N    

    D) 100 N

    Correct Answer: D

    Solution :

    \[T\,\cos \,{{45}^{{}^\circ }}=mg\] \[T\,\cos \,{{45}^{{}^\circ }}=F\] \[\Rightarrow \] \[F=mg=100\text{ }N.\]


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