A Potter's Wheel Has the Shape of a Solid Uniform $7.0 \mathrm {~kg}$

question 90

Multiple Choice

A potter's wheel has the shape of a solid uniform disk of mass $7.0 \mathrm {~kg}$ 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)1.8 kg ? m²
• B)1.5 kg ? m²
• C)0.40 kg ? m²
• D)2.5 kg ? m²

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