[填空题]
A uniform disk turns 5ry/kjisjtb45(bwqy 0:f 6 uzat 2.4 :m xj3xtmy17o8m9nl o8n gap($rev/s$ 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? $rev/s$