Q: Two particles, each of mass m are attached to a light rod of length d, one at its centre and the other at a free end. The rod is fixed at the other end and is rotated in a plane at an angular speed ω . The angular momentum of the particle at the end w.r.t. the particle at the centre is
(a) $ \displaystyle \frac{1}{2}m \omega d^2 $
(b)$ \displaystyle \frac{1}{4}m \omega d^2 $
(c)$ \displaystyle \frac{1}{3}m \omega d^2 $
(d)$ \displaystyle \frac{2}{3}m \omega d^2 $
Ans: (b)