Question

Define pressure and thrust and give their SI units.

Answer 1

1. The force acting normally (perpendicular) on a surface is called thrust.
2. Thrust is a vector quantity since the direction needs to be specified (perpendicular).
3. SI unit of thrust is the same as that of force, i.e., Newton (N).
4. Pressure is defined as the thrust acting per unit area of a body.
5. $Pressure=\frac{Thrust}{Area}=\frac{Normalforce}{Area}=\frac{d{F}_{\perp }}{dA}$
6. SI Unit of pressure is Pascal (P).