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20. (a) Since the force of impact on the ball is in the
y
direction,
p
x
is conserved:
p
x i
=
mv
i
sin
θ
1
=
p
x f
=
mv
i
sin
2
.
With
1
= 30.0°, we find
2
= 30.0°.
(b) The momentum change is
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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, Force, Momentum

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