1. CE 321 Lab 2 – Fluid Statics General Information
Worksheet and Spreadsheets due Thursday by 12 Noon
Lab Reports due Tuesday by 4.00 pm

2. Hydrostatic Theory
Horizontal Plane
Resultant Force =

3. Vertical Plane ……………………………... (1) (Theoretical) …………………… (2)
Centroid= h/2
……………………………... (1) (Theoretical)
…………………… (2)

4. Objectives
Experimentally verify the accuracy of the equation derived from
Hydrostatic theory to predict the location of center of pressure
Determine if uncertainty in measurements appear to explain the
inaccuracy in predicting the location of center of pressure using
the equation derived from Hydrostatic theory
Comment on the suitability of the equation derived from Hydrostatic
theory for engineering use

5. = force produced by the mass placed on the tray, = resultant forceFR yR L2 L3 w l CW W L1 L4
Pivot
Where,
= force produced by the mass placed on the tray,
= resultant force
= length of the arm where resultant force acts
= length of the arm where W acts
= location on the submerged plane where resultant force is acting
(Experimental)

6. Pressure Prism for Partially and Fully submerged case
PPre
Pressure Prism for Partially and Fully submerged case
Partially Submerged
Fully Submerged

7. Post Lab Session Analysis
Enter data into spreadsheet & study the plot
Theo
Uncertainty explains inaccuracy
Uncertainty does not explain inaccuracy

8. In order to answer each objective
NOTE: Consider the two cases (partially and fully submerged) separately for each objective
Objective 1
Consider the inaccuracy in both the 2 cases separately
Look at Error ( Relative error)
Objective 2
Look at the plot and comment
Compare Error and Propagated uncertainty. Does uncertainty account for inaccuracy?
Objective 3
Comment on suitability of Eq.1. for engineering use
Consider inaccuracy, uncertainty and state the logic behind your conclusion