You are riding a bicycle at a speed of 15 m/s. The bycicle has tires with diameters measuring 630 mm. You can approximate each tire as a solid cyllinder (to calculate inertia) with a mass of 0.5 kg. What is the total rotational kinetic energy of the bicycle?
Total rotational KE = 2 I w^2
I = M*R^2 is the moment of inertia of ONE tire
w = V/R is the tire angular velocity
R = 0.315 m
You do the numbers