Question

Where does a rigid body contains its Centre of Mass?
1. only inside the body 
2. Only outside the body
3. Either inside or outside the body
4. None of the above

Answer 1

Correct Answer - Option 3 : Either inside or outside the body

The correct answer is option 3) i.e. Either inside or outside the body.

CONCEPT:

• Centre of mass: The point where the whole mass of a body is assumed to be concentrated.
• The Centre of mass may lie either inside or outside the body.

EXPLANATION:

• The position of the centre of mass of an object depends on the distribution of mass over the body.
• For a solid sphere, the centre of mass is at its centre i.e. inside the sphere.
• For a solid ring, the centre of mass is at its geometric centre i.e. outside the ring.