[填空题]
A grinding wheel is a uniform cylinder wicjt ftg/5 .+ywthbzozriw3sy w6a aay)s,t4y*04 p nd7) a radius of 8.50 cm and a mass of 0.580 kg. Calcu)oa4 zw3i4)nz*7p6yya0 da btsyws r, late (a) its moment of inertia about its center, $\approx$ $kg \cdot m^2$ (b) the applied torque needed to accelerate it from rest to 1500 rpm in 5.00 s if it is known to slow down from 1500 rpm to rest in 55.0 s。 $m \cdot N$