100 This figure shows a cross section of a submerged tunnel used by automobiles to travel...

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100 This figure shows a cross section of a submerged tunnel used by automobiles to travel under a river. Find the magnitude and location of the resultant hydrostatic force on the circular roof of the tunnel. The tunnel is 4 mi long. Fx = 0 No horizontal force due to the symmetry h = 50ft + R 1 = 4 mi 50' h R = 20' 2R Fy = W = Ywater V = Ywater l [2Rh R] - 2 lb = (62.4 113) (4mi) (5280) [2(20ft) (70ft) (20ft)] = 2 (20ft)] = 2.8610 lb 100 This figure shows a cross section of a submerged tunnel used by automobiles to travel under a river. Find the magnitude and location of the resultant hydrostatic force on the circular roof of the tunnel. The tunnel is 4 mi long. Fx = 0 No horizontal force due to the symmetry h = 50ft + R 1 = 4 mi 50' h R = 20' 2R Fy = W = Ywater V = Ywater l [2Rh R] - 2 lb = (62.4 113) (4mi) (5280) [2(20ft) (70ft) (20ft)] = 2 (20ft)] = 2.8610 lb