A cube of wood having an edge dimension of 20.5 cm and a density of 645 kg/m3 floats on water. (a) What is the distance from the horizontal top surface of the cube to the water level? Answer = 7.175 cm what is the answer for b ? (b) What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface? hint: Apply Archimedes' principle to find the buoyant force when the cube is just barely submerged and therefore the total weight and mass of the floating object. kg
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.
A cube of wood having an edge dimension of 20.5 cm and a density of 645 kg/m3 floats on water.
(a) What is the distance from the horizontal top surface of the cube to the water level?
Answer = 7.175 cm
what is the answer for b ?
(b) What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface?
hint: Apply Archimedes' principle to find the buoyant force when the cube is just barely submerged and therefore the total weight and mass of the floating object. kg
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