A potter's wheel, with rotational inertia 46 kg ? m2, 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
Answer: A
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