Experimental Procedure a Level the apparatus and balance the lever with the adjustable spring with the jockey weight at zero setting. Note the weight of the jockey, and the following dimensions:

diameter of the nozzie (D), height of the vane above the tip of the nozzle when the lever is balanced (s), and distance from the pivot of the lever to the centre of the vane (L). b. Open the bench supply valve and increase the flow rate to maximum. The force on the vare displaces the lever, so restore the balanced position by sliding the jockey weight along the lever Establish the mass flow rate by collecting a known volume of water over timed intervals. Male further observations at a number of lower flow rates; around eight readings should be enough c. The best way to set the conditions for reduced flow rate is to place the jockey weight exactly a the desired position and then to adjust the flow control valve to bring the lever to the balanced position. The condition of balance is thereby found without touching the lever which is much easier than finding the point of balance by sliding the jockey weight and, the range of settings of the jockey position may be divided neatly into equal steps. d. Run the experiment twice, once with the flat plate and the hemispherical cup, six readings wil be enough for each Record your results in tables 1 and 2 and use the results to compare the theoretical and experimental values by plotting them as a graph (Figure A). NB. It is easier to start measurements at the maximum flow rate and gradually decrease it rathe than starting at the minimum flow and building it up.