Relation between centre of mass and center of gravity?

[manoj mishra]

Homework Statement

What is the Relation between center of mass and center of gravity, please compare with simple example. Bco'z i am very confused about it

Homework Equations

The Attempt at a Solution

 

[PhanthomJay]

In a non zero uniform gravitational field, they are the same. An oject on planet Earth has the same cm as cg, neglecting any insignificant changes in g for even extremely tall objects (g is assumed constant at 9.81 m/sec^2 near Earth's surface).