Question

Question 1 (20 marks) (a) (10 marks) This is a section of a dam that holds up water up to a height of 25 m in the spring. When summer arrives, due to evaporation, this height drops by 10 m. As a design engineer on this project, you are to design a gate for releasing water. This gate opens about a single pivot point (dark circle) by angle e (30 about the vertical axis. The customer requires some questions to be addressed and your final recommendation on the gate design i. What is the magnitude and where is the resultant force acting upon, on a circular gate (Radius-1 m) that is opened during the summer (2 marks)? As straight lines are easier to fabricate then curved lines, what is the magnitude and i. where is the resultant force acting upon, on an isosceles triangular gate (height-1.5 m and base 1 m) that is opened during summer (2 marks)? Assuming that the apex of the triangle coincides with the pivot point ii. What is the magnitude and where is the resultant force acting upon, on a circular gate (Radius-1 m) that is opened during spring (4 marks)? iv. Can the pressure prism concept be applied to the circular gate (0.5 mark)? Why (1.5 marks)? Horizontal axis-*

Answer 1

Iin summer) 26、640057 KN ee surtace CP hc108253 m

3 34.88 0.297 kN Cente ot pressove ะ oint o Ci X 60

Page Date 3 6.37/78-kN. 3 6 e hop 105 3525 m he_pvessuve-presn-can-also- be- af Fred, because で Y es
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