And if I theoretically continue to halve until the tank only holds 1 ounce of water the that 1 ounce still exerts 1000 lbs on the long side. Same formula states that since only depth matters in pressure then if I halve the width of the tank (front to back) then the total force on the long side remains the same 1000 lbs. 43 is psi per foot of depth and average psi is at depth 1 foot in this case. The water level is indicated on a scale on the side of the quadrant.I building a tank for water 2ft high, 2ft wide (front to back), 8 feet long (left to right) Common formulas dictate the total force on the long sides is approx 1000lbs (w x h x. Water is added to the tank via a flexible tube and may be drained through a valve in the side of the tank. An indicator attached to the side of the tank shows when the balance arm is horizontal. Correct alignment is indicated on a circular spirit level mounted on the base of the tank. This assembly is mounted on top of an acrylic tank which may be levelled by adjusting screwed feet. The balance arm incorporates a hanger for the weights supplied and an adjustable counterbalance. This means that when the quadrant is immersed, the only force that gives rise to a moment about the knife edges is the hydrostatic force acting on the end face of the quadrant. The knife edges coincide with the centre of the arc of the quadrant. The Hydrostatic Pressure accessory has been designed to determine the static thrust exerted by a fluid on a submerged surface and enables comparison of the measured magnitude and position of this force with simple theory.Ī fabricated quadrant is mounted on a balance arm which pivots on knife edges.
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