Comparing Pendulum and Plank Fall Rates

This lecture starts by finishing an exercise comparing the fall of a simple pendulum with that of a plank of the same mass. The instructor explains the equations for both cases, highlighting the differences due to the distribution of mass. The lecture covers the calculation of moments of forces and equations for moment. The concept of moment of inertia is discussed, emphasizing the importance of symmetry in determining principal axes. The lecture concludes with examples of calculating moments of inertia for different shapes and the invariance of the inertia tensor under rotations.