A time varying force F = 2t is applied on a spool as shown in the figure. The angular momentum of the spool at time t, about bottom most point is

Q: A time varying force F = 2t is applied on a spool as shown in the figure. The angular momentum of the spool at time t, about bottom most point is

Numerical

(a) $\frac{r^2 t^2}{R}$

(b) $\frac{(R + r)^2 t^2}{r}$

(c) $ R t^2$

(d) $\frac{R^2 t^2}{r}$

Ans: (c)