Moments

1.
a)
A(.4)=2n(.3)
A=2n(.3)÷(.4)
A=.6n÷.4
A=1.5n
b)
B(.20)=4n(.25)
B=4n(.25)÷(.20)
B= 1n÷.2
B=5

2.
a)
C(.25)=4n(.15)+1n(.4)
C=.6n+.4n÷.25
C=1n÷.25
C=4
b)
D(.3)+1n(.25)=5n(.4)
D(.3)=5n(.4)-1n(.20)
D(.3)=2-.2n
D(.3)= 1.8n÷.3
D=6

3.
W(.25)=5(.2)
W=1n÷.25
W=4

4.
a)
cw(10)=20,000(30)
cw=600,000÷10
cw=60,000
b)
The position of center of gravity holds everything together and keeps it all balanced.