Find the pressure exerted on the surface of a balloon if you press with a force of 2.6 N using (a)your finger or (b) a needle. Assume the area of your fingertip is 5x10-4 m2, and the area of the needle tip is 2.3x10-7 m². (c) Find the minimum force necessary to pop the balloon with the needle, given that the balloon pops with a pressure of 3.7×105 N/m².
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
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