Centre of Mass not in the centre ?

Centre of mass is point

The rate of change of angular momentum of a system of particles about the centre of mass is equal to the sum of external torque about the centre of mass when the centre of mass is :

A uniform rod o length one meter is bent at its midpoint to make 90^@ . The distance of centre of mass from the centre of rod is (in cm )

Two homogeneous spheres P and Q of different materials and masses 1 kg and 2 kg are kept in contact. The radii of A and B are 20 cm and 10 cm respectively. What is the distance of their centre of mass from the centre of A?

Centre Of Mass|OMR

Assertion : At the centre of earth, a body has centre of mass , but no centre of gravity. Reason : This is because g = 0 at the centre of earth.

A square lamina of side a and a circular lamina of diameter a are placed touching each other as shown in figure. Find distance of their centre of mass from point O, the centre of sqaure.

Assertion: Centre of mass of a rigid body always liees inside the body. Reason: Centre of mass and centre of gravity coincide if gravity is uniform.

A circular hole is cut from a disc of radius 6 cm in such a way that the radius of the hole is 1 cm and the centre of 3 cm from the centre of the disc. The distance of the centre of mass of the remaining part from the centre of the original disc is