Find coordinates of mass center of a uniform semicircular plate of radius r placed symmetric to the y-axis of a Cartesian coordinate system, with centre at origin.

Find coordinates of mass center of a semicircular ring of radius r placed symmeric to the y-axis of a Cartesian coordinate system.

Find coordinates of mass center of a quarter sector of a uniform disk of radius r placed in the first quadrant ofa Cartesian coordinate system with centre at origin.

Find coordinates of mass center of a quarter sector of a uniform disk of radius r placed in the first quadrant ofa Cartesian coordinate system with centre at origin.

Find coordinates of mass center of a quarter ring of radius r placed in the first quadrant of a Cartesian coordinate system, with centre at origin.

Find the centre of mass of a homogeneous semicircular plate of radius a.

Find the location of centre of mass of a uniform semicirular plate of radius R and mass M .

Find the centre of mass of a uniform semicircular ring of radius R and mass M .

Find the centre of mass of a uniform semicircular ring of radius R and mass M .

Find the coordination of the centre of mass of a uniform semicircular wire of radius R and mass M.

Find the coordinates of centre of mass of a uniform semicircular closed wire frame with respect to the origin which is at its centre. Radius of the circular portion is R