Pressure(दाब)-mpsc science|dompsc

Download Pressure(दाब) Pdf
✪ Download pdf Works Properly on chrome Browser ✪

Intro of Pressure(दाब)

➤Pressure is simply force applied on particular area.
➤If you try to nail a bowling ball to the wall, nothing will happen except for the nail that people decide not to lend you bowling ball.
➤ However, if the nail is hammered with the same force, the nail is likely to penetrate the wall.
➤ This shows that sometimes it is not enough to know the magnitude of the force: you must also know how the force is distributed on the impact surface.
➤ For nails, all the forces between the wall and the nail are concentrated in a small area of ​​the nail tip.
➤ However, for bowling pins, the area in contact with the wall is much larger, so the concentration of force is much smaller.
pressure=force/area
➤Unit of Force is Newton and for area it is meter
➤So Unit of pressure is Newton/Meter
➤Newton /meter is known as Pascal.
➤ So to create a large amount of pressure, you can either exert a large force or exert a force over a small area (or do both).
➤ his definition also means that the units of pressure are newtons per square meteri.eN/M2 which is also called as pascal or abbreviated pa.
About Blaise Pascal
➤ Blaise Pascal (Blaise Pascal) is a French mathematician, physicist, inventor, philosopher, writer and Catholic theologian.
➤Blaise Pascal was a 17th-century scientist, mathematician, and philosopher.
➤Not only did he contribute to the understanding of fluid pressure, but he is also noted for "Pascal's wager", "Pascal's triangle", and "Pascal's theorem".

Thrust

➤ Thrust is a reaction force described quantitatively by Newton's third law.
When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system.
➤ The force applied on a surface in a direction perpendicular or normal to the surface is also called thrust.
➤ Force, and thus thrust, is measured using the International System of Units (SI) in newtons (symbol: N), and represents the amount needed to accelerate 1 kilogram of mass at the rate of 1 meter per second per second.
➤ In mechanical engineering, force orthogonal to the main load (such as in parallel helical gears) is referred to as thrust.

Buoyant force

➤When an object is placed in a fluid, the fluid exerts an upward force we call the buoyant force.
➤ The buoyant force comes from the pressure exerted on the object by the fluid.
➤ Because the pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top - hence the net upward force.The buoyant force is present whether the object floats or sinks.
➤Buoyancy is the force that causes objects to float.
➤It is the force exerted on an object partially or fully immersed in the liquid.
➤ Buoyancy is caused by the pressure difference acting on opposite sides of an object immersed in a static fluid.

Archimedes principle

➤ Archimedes’ principle states: An object immersed in a fluid experiences a buoyant force that is equal in magnitude to the force of gravity on the displaced fluid.
Density
➤ Density is a measure of mass per volume.
➤ The average density of an object equals its total mass divided by its total volume.
➤ An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).
➤density=mass/volume
➤unit-kg/m3
➤If density of water is more than the substance,then it will float else it will sink

---