[填空题]
A potter’s wheel is rotating arounzt y4.cp9ph ; ol9asz.d a vertical axis through itsby;:nms jxn5jn89m8 k center at a frequency of 1.5rev/s The wheel can be considered a un;98xmy 58nsmb:jjnn kiform 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 wheel. What is the frequency of the wheel after the clay sticks to it? $rev/s$