Question

A bullet on entering a target with an initial velocity u, loses of its velocity after
penetrating a distance x into the target, how much further will it penetrate?
​

Answer 1

Explanation:

initial velocity u

final velocity 0

total distance travelled S

retardation -a

x=ut+½at²

v=u+at

a=-u/t

v²=u²+2aS

S=-u²/2a

then do

It will penetrate =S-x

do it