#### The Physics of Tennis Basic Tennis Physics

The moment of inertia about the center of a tennis ball can be calculated using the formula for the moment of inertia about the center of mass of a uniform spherical shell I = 2 m 5 [r 2 5 r 1 5 r 2 3 r 1 3] I=frac{2m}{5}left[frac{r 2^5 r 1^5}{r 2^3 r 1^3}righ where m m is the mass of the ball r 1 r 1 is the inner radius and r 2 r 2 is the outer radius of the ball