Question

A bullet fired into a fixed target loses half of its velocity after penetrating . How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion ?

A

B

C

D

Medium
Updated on : 2022-09-05
Solution
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Correct option is C)

Case :

or
Case :
or

Alternative method : Let K be the initial energy and F be the resistive force. Then according to work-energy theorem,

i.e.,
     
          ............(1)
and
i.e.,   .........(2)
 Comparing eqns. (1) and (2)
   
or

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