[填空题]
A uniform disk turns hfd*vahp69bx pj2 m-o2jm6,n j66b to atqfj q2f69 7m/dol.iho:vk2orl +kof+ 2.4 $rev/s$ 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? $rev/s$