Pure water has a surface tension of 0.0728N/m. Soap water has a surface tension of 0.025N/m. A soap boat was made with a mass of 0.5g and a square surface area of 2cm x 2cm. Show that the soap boat can stay afloat on both pure water and soap water solely with the force of surface tension. Calculate the acceleration of the boat on pure water when a drop of soap is added to the rear edge of the boat if the angle from the vertical is 40 degrees.
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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