[填空题]
A uniform circular plate ofgwiu 8+ 4wio,p radius 2R has a circular hole of radiusr*-nkei *rd) d5p8i ql R cut out of it. The center of the smaller circle is a distance 8rip )n5drid-kleq** 0.80R from the center C of the larger circle, Fig. 7–41. What is the position of the center of mass of the plate? [Hint: Try subtraction.] R