Home > Courses > 1P21_Sternin > LinearAngularMomentum Introduction Kinematics: motion in one and two dimensions Dynamics Work and energy Rotational motion Linear and angular momentum Linear momentum Ex: tennis ball (an elastic collision) external and internal forces in a collision $p_{\rm system} = \mbox{const}$, is a separate conservation law Ex: two skaters (c.o.m. does not move) Ex: an exploding shell (c.o.m. keeps on going) elastic collisions in 1D (C.o.K.E. + C.o.M.) Ex: billiard balls, ball against the wall, a golf club inelastic collisions in 1D (only C.o.M.) Ex: a ballistic pendulum Angular momentum angular momentum, $L = I \omega$ conservation of angular momentum Ex: a figure skater's spin vector nature of $\vec{L}$ and $\vec{\tau}$ precession and gyroscopes