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ighth<br />
dition<br />
Vector Mechanics for Engineers: Statics<br />
Sample Problem 2.7<br />
SOLUTION:<br />
• Determine the unit vector pointing from A<br />
towards B.<br />
<br />
AB 40 m i 80 m j 30m k<br />
<br />
AB <br />
94.3 m<br />
2 2<br />
<br />
40 m 80m 30m<br />
40 80 30 <br />
i<br />
j k<br />
94.3<br />
94.3<br />
94.3<br />
<br />
0.424i<br />
0.848 j 0.318k<br />
• Determine the components of the force.<br />
<br />
F F<br />
<br />
2500 N 0.424i<br />
0.848 j 0.318k<br />
<br />
1060 N i 2120 N j 795 N<br />
<br />
k<br />
2<br />
© 2007 The McGraw-Hill Companies, Inc. All rights reserved.<br />
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