Unformatted text preview: m m
" $ N " kg
# kg m/s
m/s m
!m N
P12. Find the tension in the two wires supporting the traffic light shown in Fig. 946.
Solution: %
% % & 2 & cos "'°
sin "'° & cos "°
sin "° cos "'°
cos "° sin "'°
8
3 cos "'°
cos "° sin "° N
N P18. Approximately what magnitude force, F , must the extensor muscle in the upper
arm exert on the lower arm to hold a 73 kg shot put. Assume the lower arm has a mass of
2.8 kg and its CG is 12 cm from the elbowjoint pivot.
Solution: ()*
+ m
N P20.
Calculate the force required of the "deltoid" muscle, F , to hold up the
outstretched arm shown in Fig. 1264. The total mass of the arm is 3.3 kg.
Calculate
the magnit...
View
Full Document
 Fall '08
 engle
 mechanics, Force, Friction, Mass, Static Equilibrium, Work, Cos, Extensor muscle

Click to edit the document details