Railways NTPC (Technical Ability) Fluid Mechanics and Machinery Question Bank Fluid Mechanics

  • question_answer
    In which of the following cases frictional drag is predominating?
    1. Tennis ball                
    2. Parachute
    3. Arrow                       
    4. Cyclist

    A) 1 and 2 only                 

    B) 2 and 3

    C) 2, 3 and 4 only  

    D) 1, 2 and 3 only

    Correct Answer: D


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