Question

Define/Explain the following.
1. Pressure
2. pascal
3. Atmospheric pressure
4. Liquid pressure

Answer 1

1. Pressure is defined as force per unit of area.
2. Pascal (Pa) is the SI unit of pressure, which is Newton (N) per metre (m²) i.e. N/m².
3. Atmospheric pressure is defined as the pressure exerted on an object by the air above it.
4. Liquid pressure is the pressure exerted on an object by the liquid in which it is immersed, where a net upward force determines whether the object will sink or float.