Unformatted text preview: ude of the force F+ exerted by the shoulder joint on the upper arm.
Solution: 3 %*,
sin % +% &- m +% %- ° ! $ ! $ +% !m N +& N cos
& +& + )* ° N sin ° ! !$
" " kg N
m/s " "! N N +& P30. A shop sign weighing 215 N is supported by a uniform 135-N beam as shown in
Fig.12-70. find the tension in the guy wire and the horizontal and vertical forces exerted
by the pin on the beam.
Solution: Condition for the equilibrium of the sign: N
Condition for the equilibrium of the beam:
"N 'm sin " ° N
"m 'm N # 4 %- .* % % .* % &- N cos " ° # .* & & .* & N "N "N N sin " ° # '" N we supposed...
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