C1 = 20 x sin 60ᵒ
C1 = 20 x 0,866
C1 = 17,320 N
Menghitung RA dan RB.
∑ MB = 0
( RA x 6 ) - ( C1 x 4 ) - ( 20 x 1 ) = 0
6RA - ( 17,320 x 4 ) - 20 = 0
6RA - 69,28 - 20 = 0
6RA = 89,28
RA = 14,88 N
∑ MA = 0
( C1 x 2 ) + ( 20 x 5 ) - ( RB x 6 ) = 0
( 17,320 x 2 ) + 100 - 6RB = 0
34,64 + 100 - 6RB = 0
- 6RB = - 134,64
RB = 22,44 N
Menghitung Momen dititik D ( MD )
MD = ( RA x 5 ) - ( C1 x 3 )
MD = ( 14,88 x 5 ) - ( 17,320 x 3 )
MD = 74,4 - 51,96
MD = 22,44 Nm ( Ditinjau dari titik A )
MD = - ( RB x 1 )
MD = - ( 22,44 x 1 )
MD = - 22,44 Nm ( Ditinjau dari titik B )
No comments:
Post a Comment