What is the thrust on unit area called?

The correct answer is Pressure.

Important Points

• Pressure (P): The force per unit area is called pressure. 
  • The SI unit of pressure is Pascal (Pa).

Pressure (P) = Force (F)/ Area (A)

• Thrust: The force acting perpendicular to the surface of the object is called thrust.
  • When any object is put into the water then the object will replace the water the same as it’s volume and the cause of which there is a force acting upwards, to balance this weight is called the thrust force.
  • The effect of thrust is more on the smaller surface area than the thrust acting on a larger surface area. 
• Pressure (P) = Thrust force (FT)/ Area (A)

Key Points

• Thrust is a kind of pull force, which is applied by the medium on the object.

Pressure (P) = Thrust force (F_T)/ Area (A). So option 4 is correct.

Additional Information

• Density: The mass per unit volume is called density.