\fdO'^ - Old Forge Coal Mines

168 ELEMENTARY MECHANICS.
replaced, and which will produce the same effect upon a
body.
(379) Southeast, in the direction of the diagonal of a
East ^ square. See Fig. 21.
Fig. 21.
47 X 54
tance from c equal to
47 + 71
Art. 911.
UTlbS
31
(380) 4' 6' = 54'. 54x2x|x
.261 = 21.141 lb. = weight of lever.
Center of gravity of lever is in the
middle, at a, Fig. 22, 27' from each
end. Consider that the lever has no
weight. The center of gravity of
the two weights is at b, at a dis-
= 21. 508' = bc. Formula 20,
-ti=i
Fig. 22.
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