Consider a uniform wire of mass and length. It is bent into a semicircle. Its moment of inertia about a line perpendicular to the plane of the wire passing through the centre is:
a) 1/2 ×mass×length²
b) 1/4 ×mass×length²
c) 1/6 ×mass×length²
d) 1/8 ×mass×length²
