Two rigid bodies $A$ and $B$ rotate with rotational kinetic energies $E_A$ and $E_B$ respectively. The moments of inertia of $A$ and $B$ about the axis of rotation are $I_A$ and $I_B$ respectively. If $I_A=\frac{I_B}{4}$ and $E_A=100E_{\mathit{B}}$ the ratio of angular momentum $\left(L_A\right)$ of $A$ to the angular momentum $\left(L_B\right)$ of $B$ is

The moments of inertia of two rotating bodies $A$ and $B$ are $I_A$ and $I_B\left(I_A>I_B\right)$ and their angular momentum are equal. If their kinetic energies be $K_A$ and $K_d,$ respectively, then

A particle of mass $m$ moves along line $PC$ with velocity $u$ as shown. What is the angular momentum of the particle about $O$.