Unformatted text preview: ball, the greater
force is required to change the ball's momentum, the larger tension in the strings is
required. If the required tension force is larger than the maximum force that the strings
can withstand, they break.
P58*.
P60. Figure 1279 shows a simple truss that carries a load at the center (C) of
!
1.25 $
N.
Calculate the force on each strut at the pins, A, B, C, D, and
determine which struts (ignore their masses) are under tension and which under
compression.
Solution: 6 FAB B
FBD FBC
FBC F1 F2 FAC
A FAB ,& FAC D C & 8 ,8
.6 6: 6; .; 6;
6; ;: 8 9 cos # °
6; sin # °
6; sin # ° ' $ " N 6: ; cos " °
cos " °
sin # ° ;: $ ! P64.* 7 N tan # ° "# $ " N...
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 Fall '08
 engle
 mechanics, Force, Friction, Mass, Static Equilibrium, Work, Cos, Extensor muscle

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