The study of the behaviour of liquids and gases, particularly the forces they produce, is known as fluid mechanics. Fluid mechanics is studied in a variety of scientific areas. Fluid mechanics has numerous applications in mechanical and chemical engineering, as well as biological and astrophysical systems. A fluid is a material that deforms constantly under a constant load. Kinematic, stress, conservation, regulating, and constitutive relationships are the most useful in fluid mechanics problems. The simplification of vector quantities is governed by the choice of the system of interest and the volume of interest, which regulate the analysis of fluid mechanics problems. The kinematics and mechanical behaviour of materials are treated as a continuous mass rather than discrete particles in fluid mechanics, which is a branch of continuous mechanics.