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COSMOS: Complete Online <strong>Sol</strong>utions Manual Organization System<br />
Chapter 2, <strong>Sol</strong>ution 87.<br />
!!!"<br />
DB = i − j − k<br />
( 36 in. ) ( 42 in. ) ( 36 in. )<br />
( ) ( ) ( )<br />
2 2 2<br />
DB = 36 in. + − 42 in. + − 36 in. = 66 in.<br />
T<br />
= T λ = T<br />
DB DB DB DB<br />
!!!"<br />
DB<br />
DB<br />
T 55 lb<br />
( 36 in. ) ( 42 in. ) ( 36 in. )<br />
DB =<br />
66 in.<br />
⎡ ⎣ i − j − k ⎤ ⎦<br />
( 30 lb) ( 35 lb) ( 30 lb)<br />
= i − j − k<br />
T = !<br />
∴ ( ) 30.0 lb<br />
DB<br />
x<br />
( ) 35.0 lb<br />
T =− !<br />
DB<br />
y<br />
( ) 30.0 lb<br />
T =− !<br />
DB<br />
z<br />
Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr.,<br />
Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell<br />
© 2007 The McGraw-Hill Companies.
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