If a particle moving along a line follows the law  t = as2 + bs + c, then the retardation of the particle is proportional to 

If a particle moving along a line follows the law  t = as2 + bs + c, then the retardation of the particle is proportional to 

  1. A

    square of the velocity 

  2. B

    cube of the displacement

  3. C

    cube of the velocity 

  4. D

    square of the displacement 

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    Solution:

    we have, 

    t=as2+bs+c 1=(2as+b)dsdt dsdt=12as+bd2sdt2=2a(2as+b)2dsdt=2adsdt3

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