[填空题]
A potter’s wheel is rotating around a vertical axis through its center at a frkwh03(; a gg+rueorn8vkf *lmp,v y3zs il5:6equency of 1.5rev/s The wheel can be considered a uniform disk of mass 5.0 kg and diameter 0.40 m. The potter thellmfvpy3: 56k *s, ivzn 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? $rev/s$