If F is a force acting normally on a surface of area A, then the pressure P is given by

Options

A. F x A
B. F + A
C. F/A
D. none

Explanation

To solve the question "If F is a force acting normally on a surface of area A, then the pressure P is given by?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Pressure**:
Pressure is defined as the force exerted per unit area. It is a measure of how much force is applied over a specific area.

2. **Identify the Variables**:
- Let \( F \) represent the force acting on the surface.
- Let \( A \) represent the area over which the force is acting.

3. **Use the Formula for Pressure**:
The formula for pressure \( P \) is given by:
\[ P = \frac{F}{A} \]
This means that pressure is equal to the force divided by the area.

4. **Interpret the Formula**:
- If the force \( F \) increases while the area \( A \) remains constant, the pressure \( P \) will increase.
- Conversely, if the area \( A \) increases while the force \( F \) remains constant, the pressure \( P \) will decrease.

5. **Conclusion**:
Therefore, the correct expression for pressure when a force \( F \) acts normally on an area \( A \) is:
\[ P = \frac{F}{A} \]