A cylinder is rolling down a rough inclined plane. Its angular momentum about the point of contact remains constant. Is this statement true or false?

Explanation

To determine whether the statement "A cylinder is rolling down a rough inclined plane. Its angular momentum about the point of contact remains constant" is true or false, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Identify the System**: We have a cylinder rolling down a rough inclined plane. The cylinder has a center of mass and a point of contact with the inclined plane.

2. **Draw the Free Body Diagram**:
- Draw the inclined plane and the cylinder.
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