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36. From Fig. 955, +
y
corresponds to the direction of the rebound (directly away from
the wall) and +
x
towards the right. Using unitvector notation, the ball’s initial and final
velocities are
ˆˆ
ˆ
ˆ
cos i
sin j 5.2 i 3.0 j
ˆ
ˆ
cos i
sin j 5.2 i 3.0 j
i
f
vv
v
v
θθ
=−=
−
=+
=
+
G
G
respectively (with SI units understood).
(a) With
m
= 0.30 kg, the impulsemomentum theorem (Eq. 931) yields
()
2 0.30 kg (3.0 m/s j)
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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

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