A bullet fired into a fixed target loses half of it's velocity in penetrating 15cm.How much further it will penetrate before coming to test?
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1
Answer:
Applying the Equation of motion for the initial velocity of the bullet
v
2
=u
2
+2aS
a=−
40
u
2
Applying the equation of motion for the bullet after penetrating 15cm
v
2
=u
2
+2aS
Here, u=0 where the bullet is at the rest
The initial velocity of the bullet after penetrating 15cm is
2
u
Applying the data in the equation of motion
We get
v
2
=u
2
+2aS
⇒
20
u
2
S=
4
u
2
⇒S=5cm
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