Whch of the following statements is incorrect ?

Options

A. In pure translation motion , every particle of the body moves with the same velocity at any instant of time .
B. In rotation about a fixed axis , every particle of the rigid body moves in a circle which lies in a plane perpendicular to the axis and has its centre on the axis
C. The centre of gravity of a body coincides with its centre of mass only if the gravitational field does not vary from one part of the body to the other .
D. The angular momentum L and the angular velocity `vecomega` are necessarily parallel vectors .

Answer

D