The thin pipe P and the uniform cylinder C have the same outside radius and the same mass. If they are both released from rest, which of the following statements is true?

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Q: m R

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.