A uniform disk of radius r = 120 mm is welded at its center to two elastic rods of equal length with fixed ends at A and B. Knowing that the disk rotates through an 8° angle when a 500-mN·m couple is applied to the disk and that it oscillates with a period of 1.3 s when the couple is removed, determine 

(a) The mass of the disk, 

(b) The period of vibration if one of the rods is removed.

Transcribed Image Text:

Fig. P19.64 B A