[填空题]
A uniform disk turns athgy6 p(ciu*-93qkw 4v6vk az i 2.49mx gg y5,2w4pxen(r y $rev/s$ around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk’s diameter, is dropped onto the freely spinning disk, Fig. 8–49. They then both turn around the spindle with their centers superposed. What is the angular frequency in rev/s of the combination? $rev/s$