A 10-cm-wide opening leading into an evacuated chamber is covered with a circular 20-cm-diameter lid. It exerts a 638 N force.
20 kPa is the chamber's pressure. The formula for calculating the required force is Force = difference in pressure x area of plate.
[tex]$F=\left(P_2-P_1\right) \times A \ldots$F=\left(P_2-P_1\right) \times \pi r^2$P_1=20000 \mathrm{~Pa}$P_2=101325 \mathrm{~Pa}$r=0.05 \mathrm{~m}$[/tex]
Now adjust equation (1) to reflect the new values, and calculate
[tex]$F=(101325-20000) \times 3.14 \times(0.05)^2=638 \mathrm{~N}$[/tex]
638 N of force is required.
The numbers from each of these observations and calculations should be entered into the primary equation, F = pA, where F is the piston force (F) in newtons (N), p is the gauge pressure, and A is the complete bore area.
An object's speed, direction of motion, or shape can all be altered by applying a force to it. A measurement of the force operating on a region is called pressure. The formula pressure = force / area can be used to calculate pressure. A force will therefore exert higher pressure while working across a smaller region.
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