2-59. The tide gate opens automatically when the tide water at B subsides, allowing the marsh at A to drain. For the water level h = 4 m, determine the horizontal reaction at the smooth stop C. The gate has a width of 2 m. At what heighth will the gate be on the verge of opening?

4.2m SCHAIN A CHINGE) GATE c.g. 2600 1m The 1 meter diameter gate shown weighs 450N and is hinged at "A" and can be opened by force "T" thru the chain weighing 60N. The center of gravity of the valve 4.2m below the water surface and the dam is inclined by 600 from the horizontal. Determine the force "T" required to open the gate. (Notes: Hydrostatic force "F" is always perpendicular to the plane surface) (A) 30.56 KN B No answer among the choices 33.49 KN D) 39.67 KN (E) 36.24 KN