Answers

  • Brainly User
2014-10-10T22:29:41+05:30
X = 3cm 
v = u/2
v^2 = u^2 + 2ax
on solving this u will get,
a = -u^2/8    ......... (1)
after penetrating,
v = 0
initial velocity = u/2

v^2 = u^2 + 2ax
0 = 1/4 - (2/8)x
x = 1cm 
so it will penetrate 1cm before coming to rest
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