[填空题]
A grinding wheel is a (sp2qn +tbf w0us5o:o uniform cylinder with a radius of 8.50 w-39) jpkkx+1 )nmfonlpa a l.k:yq 6acm and a mass of 0.580 kg. wkyalna)pkp6- 3o k x:mj).l na9+f1qCalculate (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。 $m \cdot N$