Question

Define thrust and pressure. Give their SI units.

Answer 1

force exerted by any object perpendicular to the surface area is called trust and force exerted by a object per unit area is called pressure.
the SI unit of pressure is Pascal

Answer 2

Thrust:-Thrust is a reaction force described quantitatively by Newton's third law. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system.

Pressure:-Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. ... Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as ​1⁄760 of this.
S.I. unit of thrust:-Newton
S.I. unit of pressure:-Pascal

Hope it will help.....