The equations of the curves are and
and
.
Determine the points of intersection by plotting their graphs.
\Graph:
\Draw the coordinate plane.
\Graph the curves and
.
Observe the graph:
\The two curves intersect at the points and
.
Consider and
.
Moment about - axis
of a planar lamina:
.
Where uniform density of a planar lamina.
Here value varies form
to
, so
and
.
Substitute ,
and limits of integral in the above formula.
.
Moment about - axis
of a planar lamina:
.
Substitute corresponding values in the formula.
\.
Center of mass and
, where
.
Mass of the system is .
Substitute and
in the above formula.
.
Substitute ,
and
values in center of mass formula.
.
.
Center of mass .
Moments ,
and center of mass
.