[填空题]
A potter is shaping a bowl on a potteri9c5gfd1sv9kx n+ 8qpyxi h2ne l0so7;1ft:z’s wheel rotatiy1 l8n 8kwk i33g:4tnqezdq9lq g92orng at constant angular speed (Fig. 8–42). The friction rew:qk9gn3 zq o 4t8nd9gq2yki 8l1l 3force between her hands and the 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
