Question

The SI unit of thrust is
A. N
B. dyne
C. kg wt
D. ${\text{N}}{{\text{m}}^{{\text{ - 2}}}}$

Answer 1

Hint: In order to solve this problem we need to know that thrust is nothing but the force itself that is applied suddenly within some fraction of seconds.

Complete answer:
Thrust is another name of force and is characterized as a force acting perpendicular to the body. It is a reaction force which follows Newton's third law of motion such that when the force is exerted on fluid the fluid exerts the force back and opposite to the force exerted. Also, the force is of equal magnitude. As the force and thrust are almost the same so the unit of thrust is Newton. The difference is force is applied when there is solid and thrust is applied only in case of fluids.

The SI unit, therefore, is Newton (N).

So, the correct answer is “Option A”.

Note:
In this problem you just need to know thrust is either a force or a drive. If the device moves or accelerates the mass in one direction, the thrust becomes just as high in the opposite direction. Knowing this will help you further. There is a different formula for different types of thrust. It is one of the useful terms used in fluids.