[填空题]
A grinding wheel is a uniform cylinya ju+qdwb0k.9h5n+w3o3fc d der with a radius of 8.5n72 t/wf l)uzl0 cm and a mass of 0.58z fw )ul72lnt/0 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
