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- Homework Statement:
- Find center of mass of a arc (letter B)

- Relevant Equations:
- x_com = \frac{m_1 x_1 + m_2 x_2}{m_1+m_2}

In my mind, I had cut half of B and, thought it's semi-circle. Then, I was trying to find Center of Mass by taking it as semi-circle. But, I get an answer which is approximately, close to main answer. Someone else had solved it another way

This way I can get the accurate answer. But, the picture is very blurry that's why I can't understand it. Why both answers aren't same? Is there any other way to calculate Center of Mass?

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