[填空题]
A potter is shaping a bowl on a potter’s wheel 5( w0r4nbsd qfrotating at constant angular sppmtt17)pj l 56xwi a9,u(m w9vnj*brgd +wuu9eed (Fig. 8–42). The friction force between her hands and the clay is dpa*7i6,v9bw5j 9nm)1x 9lg w+(twpu urujmt 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
