<human>:  What is the difference between the kinetic energy of a billiard ball and a bowling ball?
<bot>: The difference between the kinetic energy of a billiard ball and a bowling ball is that a bowling ball is much heavier than a billiard ball and therefore has more kinetic energy due to its greater mass. A bowling ball also has a larger diameter and picks up more momentum with each roll, further contributing to its higher kinetic energy.