A cube with sides of length L is tethered to the bottom of a pool of fluid by a rope whose length is also L. The top of the cube is a distance 5L below the water's surface. The density of the cube is 1/3 the density of the fluid in the pool. Express your answers to the following questions in terms of the density of the fluid (f), the length of a side of the cube (L), and g. (a) What is the tension in the rope? (b) If the rope is cut, what will the acceleration of the cube be (both magnitude and direction)? (c) How long will it take after the rope is cut for the cube to reach the surface of the water? (d) Once it come to rest on the surface, what fraction of the cube's volume will still be underwater?
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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