[填空题]
A potter’s wheel is rodqz h,eq c/l+(i-o pnev*y).z f / 4-yh rn8u)ly;jitetating around a vertical axis through its center at a frequency of 1.5rev/s The wheel can be considered a uniform disk of mass 5. - .lot-yin vpe8;irh yf*/jey)z4)un0 kg and diameter 0.40 m. The potter then throws a 3.1-kg chunk of clay, approximately shaped as a flat disk of radius 8.0 cm, onto the center of the rotating wheel. What is the frequency of the wheel after the clay sticks to it? $rev/s$