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(3.00 N)( 8.00 m) (7.00 N)(6.00 m) (7.00 N)(2.00 m) 32.0 J.
WF
d
=⋅=
−
+
+
=
G
G
(b) The average power is given by Eq. 742:
avg
32.0
8.00 W.
4.00
W
P
t
==
=
(c) The distance from the coordinate origin to the initial position is
22
2
(3.00 m)
( 2.00 m)
(5.00 m)
6.16 m,
i
d
=+
−
+
=
and the magnitude of the distance from the coordinate origin to the final position is
222
( 5.00 m)
(4.00 m)
(7.00 m)
9.49 m
f
d
=−
+
+
=
.
Their scalar (dot) product is
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This note was uploaded on 03/19/2010 for the course PHYSICS 191262 taught by Professor Najafzadeh during the Spring '09 term at The Petroleum Institute.
 Spring '09
 NAJAFZADEH
 mechanics, Power

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