Question

All the particles of a body are situated at a distance R from the origin,

Answer 1

All particles of a body are situated at a distance R from the origin. The distance of the centre of mass of the body from the origin is (a) = R (b) <=R (c) > R (d) >=R

ANSWER :

Here it says all particles are at a distance R from the origin but it does not explain anything about the distance between the particles.

So let us take all particles together at R, so the COM will be at R.

Now let us separate all particles so that they all are in a circle and at a distance R from origin. In that case the COM lies on the origin.

Only option (b) <=R satisfies both the condition.

Answer 2

Answer:

<=R

Explanation:

I hope this is helpful for you