problem01_77 - R B E E horizontal below 13 2 158 2 37 tan =...

1.77:
exerts. biceps the force the is B

N; 160
N 2 . 37 N, 2 . 158 Then
N 5 . 132 , 0
N 7 . 169 43 cos N, 2 . 158 43 sin
,
upward. is and N 5 . 132 where ,
exerts. elbow the force the is
2 2   
   
  
       
   
  
y x
y x
y x
y x
y y y x x x
E E E