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**1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?**

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- Thread starter Duely Cack
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LowlyPion

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1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?

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What are your thoughts on how to go about solving it.

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LowlyPion

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^{2}so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)^{2}maybe?

What is the moment of inertia of the phonograph?

Using the moment of inertia what is the formula then for rotational kinetic energy?

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