We cannot rise from a chair without bending a little forward. Give reason

Explanation

To understand why we cannot rise from a chair without bending a little forward, we need to analyze the concepts of center of mass and balance.

### Step-by-Step Solution:

1. **Understanding Center of Mass**:
- The center of mass of an object is the point where its mass is considered to be concentrated. For a human body, the center of mass is typically located around the lower abdomen.

2. **Positioning in a Chair**:
...