A Potter's Wheel Has the Shape of a Solid Uniform $2.5 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$

Multiple Choice

A potter's wheel has the shape of a solid uniform disk of mass 7.0 kg and radius 0.65 m. It spins about an axis perpendicular to the disk at its center. A small 2.1 kg lump of very dense clay is
Dropped onto the wheel at a distance 0.41 m from the axis. What is the moment of inertia of the
System about the axis of spin?

A) $2.5 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$
B) $1.5 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$
C) $1.8 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$
D) $0.40 \mathrm {~kg} \cdot \mathrm { m } ^ { 2 }$