2. Questions Bank
  3. Railways
  4. NTPC (Technical Ability)
  5. Engineering Mechanics and Strength of Materials

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

  • question_answer
    A man is pulling a bucket of water up to the roof of a building of 6 m height. The total weight of the rope is 20 N and the weight of the bucket with water is 100 N. The work done by the man is:

    A) 720 N-m                       

    B) 420 N-m

    C) 660 N-m                       

    D) 600 N-m

    Correct Answer: C

    Solution :

    Total work done \[=100\times 6+\frac{1}{2}\times 20\times 6\] = 660 Nm


You need to login to perform this action.
You will be redirected in 3 sec spinner