Question

Which one of following statements related to center of gravity is incorrect?

• A. The center of gravity of an object is defined as point through which its whole weight appears to act.
• B. The center of gravity is sometimes confused with center of mass.
• C. The center of gravity always lies inside object.
• D. For an object placed in a uniform gravitational field, center of gravity coincides with center of mass.

Answer 1

The correct option is C The center of gravity always lies inside object.

A is the proper definition. In some bodies like hollow bodies, frames and rings, the center of gravity is at the geometric centre where the matter of the object is not present.