[" Example "9" From a semicircular disc of radius "r_(1)," another "],[" semicircular disc of radius "r_(2)" is removed.Find the c.m.of the "],[" remaining position."]

From a circular disc of radius R , another disc of diameter R is removed. Locate c.m. of the remaining portion.

A semicircular disc has a radius of 21 cm. Find its perimeter.

From a disc of radius r_(1) , a concentric disc of radius r_(2) is removed . The mass of the remaining portion is m . Find the M.I. of the remaining about an axis passing through the center of mass and perpendicular to the plane.

Locate c.m. of thin , uniform semicircular wire of radius R .

From a uniform disc of radius R, a small disc of radius (R)/(2) is cut and removed as shown in the diagram. Find the center of mass of the remaining portion of the disc.

From a disc of mass m and radius r , a circular portion of radius (r )/(3) is removed from the edges. Find the M.O.I of the remaining system about a normal through center of original disc

From a uniform circular disc of radius R and mass 9M, a small disc of radius (R )/(3) is removed as shown in the figure. The moment of intertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through centre of the disc is

Out of a disc of mass M and radius R a concentric disc of mass m and radius r is removed. The M.I. of the remaining part about the symmetric axis will be :