A Thin Hoop Is Supported in a Vertical Plane by a Nail.What

Multiple Choice

A thin hoop is supported in a vertical plane by a nail.What should the radius of the hoop be in order for it to have a period of oscillation of 1.00 s? The moment of inertia of a hoop of mass M and radius R about a point on its rim is 2MR².

A) 0.0154 m
B) 0.0621 m
C) 0.124 m
D) 0.1876 m
E) 0.248 m