Question

all the 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 1

Option (B)

Answer 2

why

Answer 3

Just imagine, when all particles are on x-axis at a distance R, the centre of mass would be at distance R itself from origin. When different particles are located on the circumference of a circle of radius R with origin as centre, thus each particle are at a distance R from origin in this case also. Centre of mass in this case would be on origin. So centre of mass is never located outside this circle.

Answer 4

but the distance of centre of mass wud be always equal to r then why b option??????????

Answer 5

No, when all particles of the body are situated around the origin at equal distance R forming a circle, then its centre of mass would be at origin