Statements :
(a) Allgebric sum of moments of mass about centre of mass is equal to zero
(b) x-co-ordinate of centre of mass of system of particles in a plane is represented by
`x_(cm)=(1)/(M)summ_(1)x_(1)`
(c ) x-co-ordinate of a rigidbody of continuous mass distribution represented by
`x_(cm)=(1)/(m)intxdm`

Options

A. a and b are true
B. b and c are true
C. a and c are true
D. All a, b, c are true

Answer

D