Mass Center of a sector of a uniform circular plate
Find location of mass center of a sector of a thin uniform plate.

Explanation

To find the location of the mass center (centroid) of a sector of a thin uniform plate, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Geometry**:
- Consider a sector of a uniform circular plate with a radius \( R \) and an angle \( 2\theta \).
- The mass center will be located along the axis of symmetry, which is the y-axis in this case. Thus, \( y_{cm} = 0 \).

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