Question

At any instant, a rolling body may be considered to be in pure rotation about an axis through the point of contact. This axis is translating forward with speed
A. equal to centre of mass
B. zero
C. twice of centre of mass
D. None of these

Answer 1

Correct Answer - A
Since, in this case instantaneous axis of rotation is always below the centre of mass. This is possible only when point of contact moves with a velocity equal to centre of mass.