Which of the following is NOT an application of Pascal's law ?

Options

A. Hydraulic brakes
B. Hydraulic lift
C. Hydraulic press
D. Aerodynamic lift

Answer

To determine which of the following is NOT an application of Pascal's law, we first need to understand what Pascal's law is and its applications.

### Step-by-Step Solution:

1. **Understanding Pascal's Law**:
- Pascal's law states that when pressure is applied to a confined fluid, the pressure change is transmitted equally in all directions throughout the fluid. This means that any change in pressure at one point in a confined fluid will be felt at every other point in the fluid.

2. **Identifying Applications of Pascal's Law**:
- **Hydraulic Brake**: This system uses Pascal's law to amplify force. When the driver presses the brake pedal, the pressure is transmitted through the brake fluid to the brake pads, allowing the car to stop.
- **Hydraulic Lift**: Similar to the brake system, hydraulic lifts use Pascal's law to lift heavy objects by applying a small force over a larger area.
- **Hydraulic Press**: This device uses Pascal's law to compress materials by applying a small force over a large area, resulting in a larger force being exerted on the material being compressed.

3. **Identifying Non-Applications**:
- **Aerodynamic Lift**: This is the lift generated by the wings of an airplane as it moves through the air. It is based on Bernoulli's principle, which relates the speed of the air and the pressure above and below the wings. This principle is different from Pascal's law, as it does not involve the transmission of pressure in a confined fluid.

4. **Conclusion**:
- Among the options given, **aerodynamic lift** is NOT an application of Pascal's law. Therefore, the correct answer is aerodynamic lift.

### Final Answer:
The option that is NOT an application of Pascal's law is **aerodynamic lift**.