[填空题]
A grinding wheel is a unnl 9rcm2)k x:mz n(bb ke3g2b5iform cylinder with a radius of 8.50 cm and a m v-kzi 3bv9xv)ass of 0.)vibz v-39kxv580 kg. Calculate (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。 $m \cdot N$
Post time 2025-2-18 20:00:22
