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Railways NTPC (Technical Ability) Engineering Mechanics and Strength of Materials Question Bank Engineering Mechanics

  • question_answer
    An elevator weighing 100 kN attains an upward velocity of 4 m/s in two seconds with uniform acceleration. The tension in the cable will be approximately:

    A) 30 Kn               

    B) 100 kN

    C) 120 kN             

    D) 200 kN.

    Correct Answer: A

    Solution :

    \[T=W\left( 1-\frac{a}{g} \right)\] \[T=W\left( 1-\frac{2}{9.81} \right)=79.61=80\,N\]


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