00:00Fluid Mechanics
00:01Understanding Liquids and Gases
00:03Introduction to Fluid Mechanics
00:05Fluid Mechanics is the branch of physics that deals with the behavior of liquids and gases.
00:10It studies how fluids move, the forces they exert, and how they interact with objects.
00:15Understanding fluids is essential because they are everywhere from water and rivers and oceans to air around us.
00:21Pressure in Fluids
00:23Pressure is the force applied per unit area within a fluid.
00:28In simple terms, it's how much force a fluid exerts on a surface.
00:33Examples
00:33When you dive underwater, you feel the water pressing on your body.
00:38Air pressure in a balloon pushes outward against the rubber.
00:41Hydraulic systems use fluid pressure to lift heavy objects.
00:45Fluids exert pressure in all directions, and pressure increases with depth.
00:50This explains why deep-sea creatures can survive under immense water pressure.
00:54Buoyancy
00:54Why Objects
00:57Float Buoyancy
00:59Is the upward force.
01:02A fluid exerts on an object immersed in it.
01:04An object floats if the buoyant force is equal to or greater than its weight.
01:08Examples
01:09A boat floats on water because the water pushes it up.
01:13Icebergs float because the buoyant force balances their weight.
01:17Humans float in water due to the upward push from the water.
01:20Buoyancy depends on the density of the fluid and the volume of the object submerged.
01:25Viscosity
01:26Fluids resistance to flow
01:28Viscosity measures how thick or sticky a fluid is, and how much it resists motion.
01:35Examples
01:35Honey flows slowly because it has high viscosity.
01:39Water flows easily because it has low viscosity.
01:43Oil in a car engine provides smooth lubrication due to its viscosity.
01:47Viscosity affects how fluids move in pipes, rivers, and even inside our bodies, like blood flow.
01:55Bernoulli's principle
01:56Energy and moving fluids
01:58Bernoulli's principle states that when a fluid moves faster, its pressure decreases, and when it moves slower, its pressure increases.
02:07Exemplis
02:08Airplane wings
02:09Generate lift because air moves faster over the top surface, reducing pressure.
02:15Spraying perfume through a nozzle
02:17The fast-moving air reduces pressure and draws liquid up.
02:22Venturi tubes and water systems show how fluid speed and pressure are related.
02:26This principle helps us understand flight, water flow in pipes, and many natural phenomena.
02:32Applications of fluid mechanics
02:34Engineering
02:35Designing dams, bridges, and pipelines
02:39Transportation
02:40Airplanes, ships, and submarines
02:43Rely on fluid mechanics for movement and stability
02:47Medical science
02:48Blood circulation
02:49For drips
02:50And respiratory airflow
02:52Everyday life
02:53Drinking through a straw
02:55Shower water flow
02:56And swimming
02:57Fluid mechanics is crucial because it explains how liquids and gases behave in various situations.
03:03Helps us design safe structures and understand natural and engineered systems around us.
03:08Head Coleman
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