A Disk Is Suspended by a Nail Such That It

Multiple Choice

A disk is suspended by a nail such that it pivots in a vertical plane about a point on the edge of the disk. If the disk's radius is 25 cm, what is the period of oscillation?

A) 0.71 s
B) Need the mass of the disk to calculate the period.
C) 1.2 s
D) 1.5 s