Question

Example for center of mass not coincidence with center of gravity

Answer 1

Answer:

Free fall

Explanation:

The center of mass and center of gravity changes if the acceleration due to gravity changes. If an object is dropped from height above the surface. When an object falls free from height the acceleration due to gravity of the object changes at different point of object.

Thus, When an object is allowed to fall freely the center of gravity and the center of mass is not same.

Answer 2

If the gravitational field remains uniform over a space, i.e., field is independent of spatial position, the centre of mass and centre of gravity of a body in that space coincides. All parts of the body (however small) experiences same gravitational pull.

If the gravitational field is non uniform over a space, i.e.,field is function of spacial position, centre of gravity and centre of mas is different. Different part of the body experiences different gravitational pull.

Near Earth's surface the gravitational field remains constant and the centre of mass and centre of gravity coincides.