Question

PLEASE READ THIS BEFORE YOU START SOLVING:  I need an explanation for Part d only. The correct answer is 4.02 m, but I don't know how to get it, thanks! No need to do parts a, b and c!! THANK YOUUUUU

Free Surface A curved surface as shown in the diagram above) defined as a quarter circle with radius of length r = 18 m is submerged in a liquid with the flat edge at a distance h - 10 m below the free surface. The curved surface extends perpendicular to the plane of the diagram (or into the screen) to give the surface a width of length w 40 m Please take careful note of the position of the origin and direction of x and y axis when providing answers requiring co-ordinates. For reference, the specific weight of water under these conditions is 9.79 kNIm3 Please provide your answers to 4 significant figures. (a) What is the horizontal component of the force acting on the curved surface? FH 6.344E4 (b) What is the position of this horizontal force relative to the origin? у 12.00 Your last answer was interpreted as follows: 12.0 Correct answer to the right number of significant figures! (c) What is the vertical component of the force acting on the curved surface? Fv 2.723E4 kN Your last answer was interpreted as follows: 27230.0 Correct answer to the right number of significant figures! (d) What is the position of this vertical force relative to the origin? Your last answer was interpreted as follows: 0 The answer you have provided is incorrect The location of the vertical component of force may be determined by finding the vertical line which passes through the center of gravity of the control volume which is directly above the curved surface. This control volume is bounded by the curved surface on the bottom, two vertical lines on either side of the curved surface and the free surface of the water at the top. Once you have found the location of the center of gravity, ensure that the distance entered as your answer is from the origin located on the figure. Note: Due to the complexity of curved surface questions, there may be multiple methods which result in a correct solution to this problem. Please consult your lecture notes and/or text books for details on alternative concepts.

Answer 1

thank you

3万 so ceterf vertical fte