Hi Jason, Impulse is a change in momentum, which is distinctly different from energy, although anything in practical experience (like your baseball) for which there is an impulse, there is a change in kinetic energy, too. Impulse is a vector quantity, so it has direction, whereas kinetic energy is a scalar quantity, so it has no direction. There can be an impulse with no (net) change in kinetic energy, such as the elastic collision of a ball and a wall. And kinetic energy is directly related to work through the work-energy principle, whereas impulse is not. That may be one more intuitive way to explain the baseball's kinetic energy: if the baseball were slowed to a stop by compressing a spring, the kinetic energy in the ball is exactly the amount of work done in compressing the spring. Kerry