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48. (a) Using Eq. 748 and Eq. 323, we obtain
(4.0 N)( 2.0 m/s) (9.0 N)(4.0 m/s)
28 W.
PF
v
=⋅=
−
+
=
G
G
(b) We again use Eq. 748 and Eq. 323, but with a onecomponent velocity:
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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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