what is fluid mechanics understanding fluids and the super-easy concept of fluid mechanics before starting the lecture click on the subscribe button and get excess to our hundred of conceptual lectures for free firstly understanding fluids well any substance which can flow is known as a fluid for example gases and liquids we all know that water milk and honey flow so they all are fluids now here is one of the important concepts which a lot of people do not try to learn I mean and the definition I said substance which can flow or what do you mean by substance which can flow well let consider water and an object we know that water molecules are continuously moving our water molecules are constantly changing their relative positions thus we can say that all the molecules of water are in relative motion and the definition substance which can flow means that all the molecules of substance should be in relative motion like the relative motion of water molecules this is the more standard definition of fluids is any substance and which molecules are in relative motion are in relative flow is known as the fluids here let me ask you a question can we call sugar and floor as fluids because if you tilt a glass of sugar are a glass of floor they both flow and downward direction can you guess the answer well the answer is no the molecules are particles of sugar and floor do not change the respective position with the passage of time hence they are not fluid they are solids they fall off from any object due to their respective wed now let me also clear your concept of mechanics mechanics is the branch of science in which we study about force and its affairs by effects I mean magnitude of force direction of force etc for example consider a stationary football when you kick it you exert force on it force produces acceleration and ade thus remember that in mechanics we study about force and its effects now what is fluid mechanics the branch of science in which we study about the behavior of fluids under the action of forces is known as the fluid mechanics fluid mechanics is further divided into three parts fluid statics fluid kinematics and fluid dynamics now what is fluid statics well the word statics means it rest and we already know about the fluids I mean it is either gas or liquid thus we can say that fluid statics is the study of fluids at rest what is fluid kinematics the study of fluids and motion neglecting pressure forces is known as the fluid kinematics and we define fluid dynamics as the study of fluids and motion considering the pressure forces thus remember that fluid mechanics is further divided into three sub branches like fluid statics fluid kinematics and fluid dynamics remember that fluids have different properties like density specific weight specific volume specific gravity viscosity surface tension etc I will discuss all these properties of fluids in my upcoming videos because this was all about introduction of fluid mechanics if you have learned something new in this video they liked this video and subscribe our channel for more conceptual lectures thank you very much for watching this video