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29. We choose the positive direction in the direction of rebound so that
G
v
f
>
0 and
G
v
i
<
0. Since they have the same speed
v
, we write this as
G
vv
f
=
and
G
i
=−
. Therefore,
the change in momentum for each bullet of mass
m
is
ΔΔ
G
pmv m
v
==
2
. Consequently,
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Mass, Momentum

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