Question $4$

$1$ pt

Pendulum A has length $L$ and a bob of mass $M$ at its end.

Pendulum $B$ has length $\frac{L}{4}$ and a bob of mass $\frac{M}{9}$ at its end.

If both pendulums are set in motion with small amplitude oscillations, what is the ratio of their frequencies $\frac{f_A}{f_B}?$

$\frac{1}{4}$

$2/3$

$2/1$

$\frac{1}{2}$

$3/4$