webwork 9

"" "
①
' ''


y
-



by t fy =
O


3 Z
4 Gm t Sm =
O
m
-




( m2 8)
'
m
-
Gm + =
O
'
m (m -
4) ( m -

2) = O




M,
=
M ,
=
O
Mz
=
4 Me, = 2


" " "
=
c , tax tee t
q e
y

, ② y
' "
t
by
"
t 25y
' =
O



Ms t GMZ t 25M = O


M (m
?
tom t 25 ) =
O




M
-

-
O Mz = -

3 -14 i Mz = -
3 -
Gi
,




"
( L4X ) -1cg sin 14×1)
-




y c te Cz cos
-
-



,