[填空题]
A potter’s wheel is rotatix kx8hv;4)v5a x :19xiczy wszng around a vertical axis throq)gud qya(x) c14jm*o ugh 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 cmj(*u4ao1c q) dxqyg) hunk 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? $rev/s$