[填空题]
A potter’s wheel is rotating around a vertical axif4-+up1vwqai s atu ;l7zx(7x4ixz yr 9through 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 3y l7a(x; t7iz4xrx9uz.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? $rev/s$