For a) use the relation $\displaystyle \vec \alpha= \frac{\Delta \vec \omega}{\Delta t}$.
For b), you know that the torque is worth $\displaystyle \vec r \wedge \vec F$.
For c) check out your notes or wikipedia.
For d)$\displaystyle L_i=I_G \omega _i$.
For e) $\displaystyle E_f=\frac{I_G \omega _f^2}{2}$.
__________________ **Isaac** If the problem is too hard just let the Universe solve it. |