Conservation of Angular Momentum: a Potter's Wheel, with Rotational Inertia

question 20

Multiple Choice

Conservation of angular momentum: A potter's wheel, with rotational inertia is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis. If the subsequent angular speed of the wheel and clay is 32 rpm what is the mass of the clay?

• A) 8.0 kg
• B) 5.4 kg
• C) 7.0 kg
• D) 8.8 kg

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