Lab Worksheet PS253 - Rotational 7. Calculate the individual theoretical values of the rotational inertias of the ring plate using Table 1 in the lab manual and your measurements of their masses geometries. a. Theoretical Sm Ring: b. Theoretical Lg Ring: C. Theoretical Plate: 8. Use percent differences to compare the experimental values to the theoretical values. 9%difference= Experimental- Theoretical * 100