[填空题]
A potter is shaping a bowl on a potter’s wheel rotating at constan tp/4 rx3p.heht angular s (z( 7szrw 32wfkqh/up1j cyd*peed (Fig. 8–42). The friction force between her hands and d /2zyk*h srjwc3u1(zp(wqf7the clay is 1.5 N total. (a) How large is her torque on the wheel, if the diameter of the bowl is 12 cm? $m \cdot N$ (b) How long would it take for the potter’s wheel to stop if the only torque acting on it is due to the potter’s hand? The initial angular velocity of the wheel is 1.6 rev/s, and the moment of inertia of the wheel and the bowl is 0.11 $kg \cdot m^2$. s
Post time 2025-2-18 20:00:22
