2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-85

  • question_answer
    A spherical ball of iron of radius 2 mm is falling through a column of glycerine. If densities of glycerine and iron are respectively \[1.3\times {{10}^{3}}kg/{{m}^{3}}\] and \[8\times {{10}^{3}}kg/{{m}^{3}},\]\[\eta \]for glycerine \[=0.83N{{m}^{-2}}\sec ,\] then the terminal velocity is

    A) 0.7 m/s

    B)                    0.07 m/s

    C) 0.007 m/s         

    D)        0.0007 m/s

    Correct Answer: B

    Solution :

    [b] Terminal velocity, \[{{v}_{0}}=\frac{2\,\,{{r}^{2}}(\rho -{{\rho }_{0}})g}{9\eta }\] \[=\frac{2\times {{(2\times {{10}^{-3}})}^{2}}\times (8-1.3)\times {{10}^{3}}\times 9.8}{9\times 0.83}\] \[=0.07\,\,m{{s}^{-1}}\]


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