A fluid is any material that can flow and that takes the shape of its container. Liquids and gases are fluids.For example, you could fill a fishbowl with water or with air.Each would take the shape of the bowl. Fluids can flow because the particles in fluids move past one another easily.
Fluid statics -the study of fluids at rest in equilibrium situations. Like other equilibrium situations, it is based on Newton’s first and third laws.
Fluid dynamics - the study of fluids in motion.
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