Why is it difficult to hold a school bag having strap made of thin and strong string?

Explanation

To understand why it is difficult to hold a school bag with a strap made of thin and strong string, we can analyze the situation using the concept of pressure.

### Step-by-Step Solution:

1. **Understanding Pressure**:
- Pressure is defined as the force applied per unit area. Mathematically, it can be expressed as:
\[
\text{Pressure} = \frac{\text{Force}}{\text{Area}}
...