PhysicsA lead shot of 1 mm diameter falls through a long column of glycerin. The variation of its velocity v with distance cover is represented by 

A lead shot of 1 mm diameter falls through a long column of glycerin. The variation of its velocity v with distance cover is represented by 

  1. A

     

  2. B

     

  3. C

     

  4. D

     

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    Solution:

    The lead shot will initially accelerate due to gravity's pull, moving with increasing velocity for a while. With increase in velocity, the viscous force also keep increasing until it balances off the gravitational force. 

    The shot will move at a steady speed when the viscous force balances the pull of gravity. 

    Hence the correct answer is option A.

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