Question

distinguish between thrust and pressure.write their units.what is the relation between them?explain an application where we reduce pressure acting on a body

Answer 1

you can say thrust is just the another name of force which is mainly used while studying about fluids.
so thrust is nothing but the total force that a fluid exerts on the object which is inside the fluid.
while pressure is that force per unit area.
$pressure = \frac{force}{area}$
application.
using broad strips in school bag
reduces the pressure on our shoulder causing less pain to our shoulder. but what if we have a thin rop instead of that, we will surely have ache in our shoulder. using broader strip increases the area of the force where it was acting hence causing lesser pressur.

actually we encounter pressures mostly and not actually the forces in daily life.