Question

All the particles of a body are situated at a distance $R$ from the origin. The distance of centre of mass of the body from the origin is

• A. $=R$
• B. $\le R$
• C. $>R$
• D. $\ge R$

Answer 1

The correct option is A $=R$

In the given case it is given that all particles are at a distance $R$ from the origin but about the distance between the particles it does not explain.

If all particles together at $R$ then the centre of mass will be at $R$.

If all particles are in a circle separately and at a distance $R$ from the origin, then the centre of mass will lie on the origin.

Thus, the centre of mass of the body from the origin is $R$.