A circular piston exerts a pressure of 80 k Pa on a fluid, when the force applied to the piston is 0.2kN. What is the diameter of the piston ?
r = 0.028
D = 2r = 0.056 m
The diameter is 0.056 m.
Pressure is force divided by area.
Therefore, by the manipulations of algebra, area = force/pressure.
So the area of the piston is given by
To find diameter we first need to get the radius using the formula for the area of a circle.
So the diameter is 0.056 m.
Or 5.6 cm if you prefer.
I hope this helps,