4. [3 points] Two relatively obvious sources of error in determining the experimental launch velocity are difficulty determining the pendulum's center of mass and neglecting friction between the angle indicator and the pendulum. Another source of error, however, is treating the system as a linear collision problem, when in fact the pendulum has rotational inertia, rotational kinetic energy, and angular momentum in addition to the linear quantities used in the lab analysis. Briefly explain how including rotational kinetic energy and angular momentum would change your results; in particular, would the equation(s) that include the rotational information used to calculate the experimental velocity give a larger, smaller, or equal value for the velocity, and why?