[填空题]
A potter’s wheel is rotating xpw /,eh-;;5*x;kxa/k b ql qrsqd iu;around a vertical axis ys0t5hal x40h6f.tx pthrough its center at a frequency of 1.5rev/s The wheel can be considered a uniform disk of mass 5.0 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 wa40psh.y605tt h lfxxheel. What is the frequency of the wheel after the clay sticks to it? $rev/s$