Question

how are pressure, force and area related to each other..!!​

Answer 1

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The relationship between pressure (P), force (F) and area (A) are equivalent to:

$F[N]=P [\frac{N}{ {m}^{2} }] a</p><p>A[ {m}^{2} ]$

Pressure and force are normally transferred between fluids and solids or solids and solids in both technical and natural systems. For example, in an internal combustion engine (ICE) in a car, where the fuel-air mixture is ignited by a spark in the cylinder of the ICE. The spark causes an explosion of the fuel gas, which in turn instantaneously increases the pressure to high levels in the cylinder. The high pressure is exerted on the piston which is accelerated due to the momentum flow (force). The force is transferred via the piston area due to the high pressure gas, according to Eq (1), and it is further transferred via the drivetrain of the vehicle out on the wheels. Finally, the wheels exerts pressure on the road via the contact area between wheels and road. Consequently, the force is transferred to the road (earth) and the car is set in motion via the reaction force (Newton’s third law) that the road exerts on the car.

Equation (1) can also be understood in terms of momentum, because force and pressure are closely related to momentum (p) and intimately related as indicated by (1). The force is actually the momentum flow $. \over p$ and the pressure is the momentum flux $." \over \: (p)$

Answer 2

pressure = force / area

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