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CBSE Class 11-science Answered

Solve the following question:
Asked by nkrbasak | 18 Sep, 2011, 01:05: PM
answered-by-expert Expert Answer
  Let initial velocity of the bullet be u and constant retardation be a.

        After penetrating 3 cm its velocity becomes = u/2

        From v2 = u2 - 2as

        (u/2)2 = u2 - 2as

.·.  a  = u2/8

Let further it will penetrate through distance x and stops at some point

        0 =  (u/2)2 - 2 (u2/8)x

.·.  x = 1 cm

Answered by | 18 Sep, 2011, 02:13: PM

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